Part 6: The Exhaustive PKM Book Taxonomy — 33 Categories, 100+ Subcategories, and 300+ Sub-subcategories

An exhaustive, three-level hierarchical taxonomy for book organization in personal knowledge management systems. Places learning how to learn first, merges philosophy and religion, and leaves no node of human knowledge unmapped.

Part 6: The Exhaustive PKM Book Taxonomy

A PKM without a comprehensive taxonomy is just a digital junkyard. To build a library that scales to thousands of volumes, you need a highly structured, three-level hierarchy. This article maps out an exhaustive, zero-overlap taxonomy designed to organize all books and notes.


The Core Design Principles

Before diving into the categories, let's examine the three structural rules that govern this taxonomy:

  1. Meta-Learning First: To master any subject, you must first master the tools of acquisition. Category 01 contains learning theory, reading techniques, note-taking systems, and memory retention. Read these books first.
  2. Zero-Overlap Merging: Philosophy and Religion are two sides of the same existential coin. Merging them into a single category avoids the common confusion of where to place books like the Bhagavad Gita or Meditations.
  3. Three Levels of Nesting: The folders nest exactly three levels deep. The fourth level holds the book folder itself, structured as [Book Title] by [Author Name].

Folder Architecture

The directory structure on your filesystem or Git repository looks like this:

books/
└── [Category_01]/
    └── [Subcategory_01]/
        └── [Sub-subcategory_01]/
            └── [Book Title] by [Author Name]/
                ├── index.mdx            ← Synopsis, ratings, and tags
                ├── analysis.mdx         ← Deep critical dissection
                ├── narration.mdx        ← Chapter-by-chapter summaries
                └── metadata.json        ← Structured metadata (JSON)

Complete 33-Category Directory

Below is the complete 3-level hierarchy. Copy and paste this structure directly into your PKM folder organizer.

Category 01: Meta-Learning & Knowledge Management

Foundational systems for learning, reading, note-taking, and memory.

  • Subcategory 01.01: Learning Theory & Cognition
    • 01.01.01: Neurobiology of Learning
    • 01.01.02: Cognitive Load Optimization
    • 01.01.03: Metacognitive Strategies
    • 01.01.04: Deliberate Practice Methods
  • Subcategory 01.02: Personal Knowledge Management (PKM)
    • 01.02.01: Zettelkasten Method
    • 01.02.02: Second Brain (PARA Method)
    • 01.02.03: Digital Note-Taking Systems
    • 01.02.04: Analog Note-Taking Systems
  • Subcategory 01.03: Reading & Analysis Techniques
    • 01.03.01: Analytical Reading (How to Read a Book)
    • 01.03.02: Syntopical Reading & Integration
    • 01.03.03: Speed Reading & Comprehension
    • 01.03.04: Marginalia & Active Annotation
  • Subcategory 01.04: Research & Information Literacy
    • 01.04.01: Literature Review & Synthesis
    • 01.04.02: Fact-Checking & Source Verification
    • 01.04.03: Academic Writing & Citation Systems
  • Subcategory 01.05: Memory & Retention Systems
    • 01.05.01: Spaced Repetition (SRS)
    • 01.05.02: Mnemonic Systems & Loci Method
    • 01.05.03: Mind Mapping & Concept Diagrams

Category 02: Mathematics & Statistics

Formal logic, statistical inference, and mathematical models.

  • Subcategory 02.01: Pure Mathematics
    • 02.01.01: Logic & Set Theory
    • 02.01.02: Abstract Algebra & Group Theory
    • 02.01.03: Number Theory & Cryptography
    • 02.01.04: Topology & Geometry
    • 02.01.05: Calculus & Real Analysis
  • Subcategory 02.02: Probability & Statistics
    • 02.02.01: Probability Theory & Distributions
    • 02.02.02: Bayesian Inference & Statistics
    • 02.02.03: Frequentist Inference & Testing
    • 02.02.04: Stochastic Processes
  • Subcategory 02.03: Applied Mathematics
    • 02.03.01: Optimization Theory & Variations
    • 02.03.02: Numerical Analysis & Scientific Computing
    • 02.03.03: Information Theory & Coding

Category 03: Computer Science & Computation Theory

Theoretical foundations of computation, algorithms, and architectures.

  • Subcategory 03.01: Algorithms & Data Structures
    • 03.01.01: Algorithm Complexity & Big O
    • 03.01.02: Advanced Data Structures
    • 03.01.03: Graph Algorithms & Network Theory
  • Subcategory 03.02: Theory of Computation
    • 03.02.01: Automata Theory & Formal Languages
    • 03.02.02: Computability & Decidability
    • 03.02.03: Complexity Classes (P vs NP)
  • Subcategory 03.03: Systems & Languages
    • 03.03.01: Operating Systems Theory
    • 03.03.02: Programming Language Semantics & Compilers
    • 03.03.03: Computer Architecture & Hardware Design
    • 03.03.04: Database Storage Theory

Category 04: Software Engineering & Systems Architecture

The applied craft of software construction, design, and architecture.

  • Subcategory 04.01: Software Construction & Craft
    • 04.01.01: Clean Code & Code Quality
    • 04.01.02: Refactoring & Legacy Code
    • 04.01.03: Software Testing & QA
  • Subcategory 04.02: Software Design & Architecture
    • 04.02.01: SOLID Design Principles
    • 04.02.02: Design Patterns
    • 04.02.03: Domain-Driven Design (DDD)
    • 04.02.04: Clean & Hexagonal Architecture
  • Subcategory 04.03: Distributed Systems & Infrastructure
    • 04.03.01: Distributed Consensus & Coordination
    • 04.03.02: Microservices & Event-Driven Systems
    • 04.03.03: Site Reliability Engineering (SRE) & DevOps
    • 04.03.04: Cloud Architecture & Web Scalability

Category 05: Artificial Intelligence & Machine Learning

Statistical learning systems, neural models, and intelligence engineering.

  • Subcategory 05.01: Machine Learning Foundations
    • 05.01.01: Supervised Learning Algorithms
    • 05.01.02: Unsupervised Learning & Clustering
    • 05.01.03: Reinforcement Learning Foundations
  • Subcategory 05.02: Deep Learning
    • 05.02.01: Feedforward & Convolutional Networks
    • 05.02.02: Sequence Models & LSTMs
    • 05.02.03: Transformers & Attention Mechanisms
    • 05.02.04: Generative Models (GANs, Diffusion)
  • Subcategory 05.03: Applied AI & Engineering
    • 05.03.01: Natural Language Processing (NLP)
    • 05.03.02: Large Language Models (LLMs) & Prompting
    • 05.03.03: Computer Vision & Image Processing
    • 05.03.04: AI Safety, Ethics & Alignment
    • 05.03.05: MLOps & Production AI

Category 06: Physics & Space Sciences

Empirical science of matter, energy, space, and time.

  • Subcategory 06.01: Classical Physics
    • 06.01.01: Classical Mechanics
    • 06.01.02: Electromagnetism & Optics
    • 06.01.03: Thermodynamics & Statistical Mechanics
  • Subcategory 06.02: Modern Physics
    • 06.02.01: Quantum Mechanics
    • 06.02.02: Special & General Relativity
    • 06.02.03: Particle Physics & Standard Model
  • Subcategory 06.03: Astronomy & Cosmology
    • 06.03.01: Astrophysics & Stellar Systems
    • 06.03.02: Cosmology & Big Bang Theory
    • 06.03.03: Planetary Science & Space Exploration

Category 07: Chemistry & Materials Engineering

Microscopic properties of substances and materials.

  • Subcategory 07.01: Fundamental Chemistry
    • 07.01.01: Inorganic & Organic Chemistry
    • 07.01.02: Physical & Analytical Chemistry
    • 07.01.03: Biochemistry
  • Subcategory 07.02: Materials Science
    • 07.02.01: Polymers & Composites
    • 07.02.02: Metallurgy & Ceramic Materials
    • 07.02.03: Nanotechnology & Nanomaterials
  • Subcategory 07.03: Chemical & Process Engineering
    • 07.03.01: Transport Phenomena & Kinetics
    • 07.03.02: Process Control & Optimization

Category 08: Biology, Genetics & Evolutionary Science

The study of living organisms, natural selection, and ecosystems.

  • Subcategory 08.01: Cellular & Molecular Biology
    • 08.01.01: Cell Structure & Physiology
    • 08.01.02: Molecular Genetics & DNA/RNA
    • 08.01.03: Microbiology & Virology
  • Subcategory 08.02: Evolutionary Biology
    • 08.02.01: Natural Selection & Adaptation
    • 08.02.02: Genomics & Bioinformatics
    • 08.02.03: Speciation & Phylogenetics
  • Subcategory 08.03: Organismal Biology & Ecology
    • 08.03.01: Zoology & Animal Behavior
    • 08.03.02: Botany & Plant Biology
    • 08.03.03: Ecosystem Dynamics & Bio-networks

Category 09: Medicine, Health & Physiology

Applied biological science of human health and clinical medicine.

  • Subcategory 09.01: Clinical Medicine
    • 09.01.01: Internal Medicine
    • 09.01.02: Surgery & Medical Procedures
    • 09.01.03: Infectious Diseases & Immunology
  • Subcategory 09.02: Human Physiology & Anatomy
    • 09.02.01: Gross Anatomy & Histology
    • 09.02.02: Cardiovascular & Respiratory Systems
    • 09.02.03: Endocrine & Reproductive Physiology
  • Subcategory 09.03: Public Health & Pharmacology
    • 09.03.01: Epidemiology & Biostatistics
    • 09.03.02: Pharmacology & Toxicology
    • 09.03.03: Global Health Systems & Policy

Category 10: Neuroscience & Cognitive Science

Neural tissue architecture, cognitive processing, and perception.

  • Subcategory 10.01: Neurobiology
    • 10.01.01: Cellular & Synaptic Neuroscience
    • 10.01.02: Neuroanatomy & Brain Systems
    • 10.01.03: Neurodevelopment & Plasticity
  • Subcategory 10.02: Cognitive Science
    • 10.02.01: Perception & Attention Mechanics
    • 10.02.02: Language Acquisition & Psycholinguistics
    • 10.02.03: Mental Representation & Consciousness

Category 11: Philosophy, Religion & Belief Systems

Merged domain covering ethics, metaphysics, comparative religion, and stoicism.

  • Subcategory 11.01: Classical & Modern Philosophy
    • 11.01.01: Epistemology & Metaphysics
    • 11.01.02: Ethics & Moral Philosophy
    • 11.01.03: Logic & Philosophy of Language
    • 11.01.04: Political Philosophy
    • 11.01.05: Philosophy of Science & Mind
  • Subcategory 11.02: Comparative Religion & Theology
    • 11.02.01: Eastern Religions (Hinduism, Buddhism, Taoism)
    • 11.02.02: Abrahamic Religions (Judaism, Christianity, Islam)
    • 11.02.03: Mythology & Ancient Folk Beliefs
    • 11.02.04: Mysticism, Esotericism & Occult Studies
  • Subcategory 11.03: Stoicism & Practical Philosophy
    • 11.03.01: Ancient Stoics (Aurelius, Seneca, Epictetus)
    • 11.03.02: Modern Stoicism & Application
    • 11.03.03: Secular Humanism & Existentialism

Category 12: Psychology & Behavioral Sciences

Scientific investigation of mind, emotion, and human social action.

  • Subcategory 12.01: Cognitive & Behavioral Psychology
    • 12.01.01: Cognitive Biases & Heuristics
    • 12.01.02: Behavior Modification & Conditioning
    • 12.01.03: Motivation, Drive & Volition
  • Subcategory 12.02: Social & Clinical Psychology
    • 12.02.01: Social Influence & Persuasion
    • 12.02.02: Group Dynamics & Crowd Behavior
    • 12.02.03: Clinical Psychopathology & Therapy
  • Subcategory 12.03: Developmental & Evolutionary Psychology
    • 12.03.01: Child & Lifespan Development
    • 12.03.02: Evolutionary Origins of Behavior
    • 12.03.03: Personality Theory & Typologies

Category 13: Personal Finance & Wealth Building

Direct management of personal wealth, budgets, and tax structures.

  • Subcategory 13.01: Financial Foundations
    • 13.01.01: Budgeting & Expense Tracking
    • 13.01.02: Debt Reduction Strategies
    • 13.01.03: Saving & Emergency Funds
  • Subcategory 13.02: Wealth Building & Strategy
    • 13.02.01: Financial Independence, Retire Early (FIRE)
    • 13.02.02: Multiple Streams of Income
    • 13.02.03: Generational Wealth & Estate Planning
  • Subcategory 13.03: Indian Finance & Taxation
    • 13.03.01: Indian Tax Laws (Section 80C, 44ADA)
    • 13.03.02: Indian Mutual Funds & SIPs
    • 13.03.03: Indian Real Estate & PPF/EPF

Category 14: Investing & Capital Markets

Market systems, equity valuations, options structures, and derivatives.

  • Subcategory 14.01: Value & Equity Investing
    • 14.01.01: Fundamental Analysis & Ratios
    • 14.01.02: Intelligent Value Investing (Graham, Buffett)
    • 14.01.03: Growth & Quality Investing
    • 14.01.04: Special Situations & Arbitrage
  • Subcategory 14.02: Technical & Quantitative Analysis
    • 14.02.01: Quantitative Finance & Algorithms
    • 14.02.02: Volatility Trading & Greeks
    • 14.02.03: Options, Futures & Derivatives
    • 14.02.04: Risk Management & Ruin Avoidance
  • Subcategory 14.03: Alternative Markets & Venture Capital
    • 14.03.01: Real Estate Investing (REITs, Commercial)
    • 14.03.02: Venture Capital & Startup Funding
    • 14.03.03: Commodities, Cryptocurrencies & Forex

Category 15: Economics & Macroeconomics

Resource allocation, monetary systems, international trade, and policy.

  • Subcategory 15.01: Economic Theory
    • 15.01.01: Classical & Neoclassical Economics
    • 15.01.02: Microeconomic Analysis & Incentives
    • 15.01.03: Keynesianism vs Austrian School
  • Subcategory 15.02: Macroeconomics & Global Systems
    • 15.02.01: Central Banking & Monetary Policy
    • 15.02.02: Trade, Tariffs & Globalization
    • 15.02.03: Institutional Economics & Nations
  • Subcategory 15.03: Applied & Behavioral Economics
    • 15.03.01: Behavioral Economics (Nudge, Rationality)
    • 15.03.02: Game Theory & Strategic Interaction
    • 15.03.03: Development Economics & Poverty

Category 16: Business Strategy & Entrepreneurship

Startup development, indie-hacking, category creation, and market expansion.

  • Subcategory 16.01: Startups & Bootstrapping
    • 16.01.01: Zero to One Validation
    • 16.01.02: Lean Startup Methodology
    • 16.01.03: Micro-SaaS & Indie Hacking
  • Subcategory 16.02: Competitive Strategy
    • 16.02.01: Porter's Five Forces & Value Chains
    • 16.02.02: Blue Ocean Strategy
    • 16.02.03: Product-Market Fit & Crossing the Chasm
  • Subcategory 16.03: Business Models & Scale
    • 16.03.01: Platform & Ecosystem Strategy
    • 16.03.02: Solopreneur & Company of One Operations
    • 16.03.03: Growth Hack & Scalability

Category 17: Management, Leadership & Operations

Operational metrics, engineering management, team coordination, and leadership.

  • Subcategory 17.01: Organizational Management
    • 17.01.01: High-Output Management (Andy Grove)
    • 17.01.02: OKRs & Strategic Goal Setting
    • 17.01.03: Project Management & Agile Methodologies
  • Subcategory 17.02: Leadership & People Operations
    • 17.02.01: Extreme Ownership & Leadership
    • 17.02.02: Crucial Conversations & Feedback
    • 17.02.03: Team Dynamics & Radical Candor
  • Subcategory 17.03: Engineering Management
    • 17.03.01: Tech Lead & Architect Roles
    • 17.03.02: Staff Engineer Track
    • 17.03.03: Developer Experience & Productivity

Category 18: Marketing, Copywriting & Public Relations

Consumer acquisition channels, direct-response copywriting, and public relations.

  • Subcategory 18.01: Direct Response & Copywriting
    • 18.01.01: Direct Response Advertising (Ogilvy, Halbert)
    • 18.01.02: Headline & Landing Page Copywriting
    • 18.01.03: Email Marketing & Cold Outreach
  • Subcategory 18.02: Digital Marketing & SEO
    • 18.02.01: Search Engine Optimization (SEO)
    • 18.02.02: Content Marketing Strategy
    • 18.02.03: Social Media Algorithms & Growth
  • Subcategory 18.03: Brand & Positioning
    • 18.03.01: Positioning & Category Creation
    • 18.03.02: Visual Identity & Brand Design
    • 18.03.03: Public Relations & Crisis Management

Category 19: Political Science, Geopolitics & Policy

State authority systems, empire cycles, resource control, and public policies.

  • Subcategory 19.01: Geopolitics & International Relations
    • 19.01.01: Realism vs Liberalism in World Politics
    • 19.01.02: Hegemonic Cycles & Empires
    • 19.01.03: Resource & Energy Geopolitics
  • Subcategory 19.02: Political Ideology & Systems
    • 19.02.01: Democracy & Electoral Systems
    • 19.02.02: Authoritarianism & Totalitarianism
    • 19.02.03: Social Democracy & Welfare States
  • Subcategory 19.03: Public Policy & Governance
    • 19.03.01: Policy Analysis & Evaluation
    • 19.03.02: Regulatory Design & Capture
    • 19.03.03: Public Choice Theory

Constitutional jurisprudence, business compliance, contracts, and litigation.

  • Subcategory 20.01: Constitutional & Systemic Law
    • 20.01.01: Constitutional Interpretation
    • 20.01.02: International Law & Treaties
    • 20.01.03: Indian Constitution & Judicial Review
  • Subcategory 20.02: Commercial & Corporate Law
    • 20.02.01: Contract Law & Obligations
    • 20.02.02: Corporate Governance & Mergers
    • 20.02.03: Intellectual Property & Copyright
  • Subcategory 20.03: Criminal & Civil Law
    • 20.03.01: Criminal Law & Procedure
    • 20.03.02: Torts & Civil Liability
    • 20.03.03: Evidence & Litigation Trial Craft

Category 21: Sociology, Anthropology & Cultural Studies

Societal structures, human evolution, and pop culture semiotics.

  • Subcategory 21.01: Anthropology
    • 21.01.01: Cultural Anthropology & Ethnography
    • 21.01.02: Physical Anthropology & Human Evolution
    • 21.01.03: Archaeology & Ancient Civilizations
  • Subcategory 21.02: Sociology
    • 21.02.01: Social Stratification & Class
    • 21.02.02: Sociology of Technology & Media
    • 21.02.03: Urban Sociology & Community Dynamics
  • Subcategory 21.03: Cultural Studies
    • 21.03.01: Semiotics & Pop Culture Analysis
    • 21.03.02: Subcultures & Counter-cultures
    • 21.03.03: Globalization & Cultural Assimilation

Category 22: World History & Civilization

Historical narratives of nations, ideation history, and economic cycles.

  • Subcategory 22.01: Ancient & Medieval History
    • 22.01.01: Greco-Roman History
    • 22.01.02: Ancient Indian History (Vedic, Maurya, Gupta)
    • 22.01.03: Silk Road & Eurasian Empires
  • Subcategory 22.02: Modern History
    • 22.02.01: European History & Industrial Revolution
    • 22.02.02: Indian Freedom Struggle & Modern India
    • 22.02.03: World War I & II
    • 22.02.04: Cold War & Post-Soviet Era
  • Subcategory 22.03: Intellectual & Economic History
    • 22.03.01: History of Economic Cycles & Debts
    • 22.03.02: History of Ideas & Scientific Revolutions
    • 22.03.03: Historiography & Historical Methodology

Category 23: Communication, Writing & Rhetoric

Techniques for technical writing, public presentations, and salary negotiations.

  • Subcategory 23.01: Non-Fiction Writing & Journalism
    • 23.01.01: Style & Craft (On Writing Well)
    • 23.01.02: Technical Writing & Documentation
    • 23.01.03: Investigative Journalism & Narratives
  • Subcategory 23.02: Rhetoric & Public Speaking
    • 23.02.01: Classical Rhetoric & Persuasion
    • 23.02.02: Presentation Zen & Slide Design
    • 23.02.03: Talk Like TED & Storytelling
  • Subcategory 23.03: Interpersonal Communication
    • 23.03.01: Negotiation (Never Split the Difference)
    • 23.03.02: Active Listening & Empathy
    • 23.03.03: Charisma & Nonverbal Cues

Category 24: Linguistics & Language Study

Language mechanics, phonetic science, etymology, and language acquisition.

  • Subcategory 24.01: Theoretical Linguistics
    • 24.01.01: Phonetics & Phonology
    • 24.01.02: Syntax & Grammar Theory
    • 24.01.03: Semantics & Pragmatics
  • Subcategory 24.02: Applied & Sociolinguistics
    • 24.02.01: Language Evolution & Etymology
    • 24.02.02: Dialects & Social Accents
    • 24.02.03: Computational Linguistics & Corpora
  • Subcategory 24.03: Language Acquisition
    • 24.03.01: Second Language Learning Methods
    • 24.03.02: Bilingualism & Cognition
    • 24.03.03: Polyglot Practice & Vocabulary Systems

Category 25: Education & Pedagogy

Educational philosophy, active learning techniques, and corporate training.

  • Subcategory 25.01: Educational Philosophy & Systems
    • 25.01.01: Classical Education & Liberal Arts
    • 25.01.02: Alternative Education (Montessori, Waldorf)
    • 25.01.03: State Schooling History & Reform
  • Subcategory 25.02: Instructional Design & Teaching
    • 25.02.01: Curriculum Development
    • 25.02.02: Active Learning & Socratic Method
    • 25.02.03: Online Education & MOOC Design
  • Subcategory 25.03: Adult Education & Professional Training
    • 25.03.01: Andragogy & Corporate Training
    • 25.03.02: Mentorship & Coaching Models
    • 25.03.03: Continuing Professional Education

Category 26: Self-Help & Personal Development

Systematic behavior change, relationship boundaries, and anxiety relief.

  • Subcategory 26.01: Applied Behavior Change
    • 26.01.01: Habit Formation & Disruption (Atomic Habits)
    • 26.01.02: Willpower, Discipline & Grit
    • 26.01.03: Goal Achievement Frameworks
  • Subcategory 26.02: Relationships & Interpersonal Effectiveness
    • 26.02.01: Friendship & Networking (Win Friends)
    • 26.02.02: Romantic Relationships & Marital Dynamics
    • 26.02.03: Conflict Resolution & Boundaries
  • Subcategory 26.03: Emotional Regulation & Mental Wellness
    • 26.03.01: Anxiety & Stress Management
    • 26.03.02: Mindfulness, Meditation & Self-Inquiry
    • 26.03.03: Trauma Resolution & Emotional Resilience

Category 27: Productivity, Time Management & Systems Thinking

Time management methodologies, cybernetic systems, and outsourcing.

  • Subcategory 27.01: Time Management Systems
    • 27.01.01: Getting Things Done (GTD)
    • 27.01.02: Time Blocking & Calendar Optimization
    • 27.01.03: Deep Work & Distraction Elimination
  • Subcategory 27.02: Systems Thinking & Cybernetics
    • 27.02.01: System Dynamics & Feedback Loops
    • 27.02.02: Complex Adaptive Systems
    • 27.02.03: Antifragility & Risk Engineering
  • Subcategory 27.03: Personal Productivity Optimization
    • 27.03.01: Automating Personal Tasks (No-code, Scripting)
    • 27.03.02: Energy Management & Routine Optimization
    • 27.03.03: Outsourcing & Virtual Assistant Systems

Category 28: Architecture, Art & Design

Visual history, graphic styling, UI/UX systems, and industrial design.

  • Subcategory 28.01: Architecture
    • 28.01.01: Architectural History (Antiquity to Postmodern)
    • 28.01.02: Spatial Theory & Urban Planning
    • 28.01.03: Sustainable Design & Building Tech
  • Subcategory 28.02: Fine Arts
    • 28.02.01: Art History (Western, Indian, East Asian)
    • 28.02.02: Art Criticism & Aesthetics
    • 28.02.03: Drawing, Painting & Sculpting Technique
  • Subcategory 28.03: Design Principles & UI/UX
    • 28.03.01: Graphic Design & Typography
    • 28.03.02: UI/UX & Human-Computer Interaction
    • 28.03.03: Industrial & Product Design

Category 29: Music, Film & Media Studies

Acoustical arts, cinema movements, screenwriting, and digital platforms.

  • Subcategory 29.01: Music
    • 29.01.01: Music Theory & Analysis
    • 29.01.02: History of Music (Classical, Jazz, Global)
    • 29.01.03: Music Production, Recording & Business
  • Subcategory 29.02: Film & Cinema
    • 29.02.01: Cinema History & Global Film Movements
    • 29.02.02: Film Theory & Aesthetics
    • 29.02.03: Screenwriting, Directing & Editing
  • Subcategory 29.03: Media & Communications
    • 29.03.01: Digital Media & Platform Theory
    • 29.03.02: Television, Broadcast & Radio Studies
    • 29.03.03: Propaganda, News Media & Public Sphere

Category 30: Nature, Ecology & Environmental Sciences

Ecosystem cycles, climate action economics, and nature narratives.

  • Subcategory 30.01: Ecology & Conservation
    • 30.01.01: Biodiversity & Ecosystem Dynamics
    • 30.01.02: Wildlife Management & Habitats
    • 30.01.03: Restoration & Urban Ecology
  • Subcategory 30.02: Climate & Sustainability
    • 30.02.01: Meteorology & Climate Science
    • 30.02.02: Environmental Policy & Economics
    • 30.02.03: Clean Tech & Resource Economics
  • Subcategory 30.03: Natural History Writing
    • 30.03.01: Narrative Nature Classics (Thoreau, Muir)
    • 30.03.02: Modern Environmental Memoir & Journalism
    • 30.03.03: Field Guides & Local Species Identification

Category 31: Biography, Memoir & Historiography

Chronicles of individual lives: startup builders, scientists, and statesmen.

  • Subcategory 31.01: Leaders & Builders
    • 31.01.01: Tech Leaders & Startup Founders
    • 31.01.02: Political & Military Leaders
    • 31.01.03: Business Builders & Financiers
  • Subcategory 31.02: Thinkers & Creators
    • 31.02.01: Scientists & Mathematicians
    • 31.02.02: Philosophers & Spiritual Figures
    • 31.02.03: Artists, Writers & Filmmakers
  • Subcategory 31.03: Personal Memoirs
    • 31.03.01: Historical Autobiographies
    • 31.03.02: Modern Personal Memoirs & Travelogues
    • 31.03.03: Collected Biographies & Profiles

Category 32: Fiction & Literature

Literary simulation engines, world science-fiction, and narrative classics.

  • Subcategory 32.01: Literary Classics & World Fiction
    • 32.01.01: Western Canon (Greco-Roman, Russian Classics)
    • 32.01.02: South Asian & Indian Fiction
    • 32.01.03: East Asian & Global Literature
  • Subcategory 32.02: Science Fiction & Speculative Fiction
    • 32.02.01: Hard Sci-Fi & Space Opera
    • 32.02.02: Cyberpunk & Technological Dystopias
    • 32.02.03: Epic & High Fantasy
  • Subcategory 32.03: Genre Fiction & Short Stories
    • 32.03.01: Mystery, Thriller & Detective Fiction
    • 32.03.02: Historical Fiction
    • 32.03.03: Anthologies & Short Stories

Category 33: Poetry, Drama & Performing Arts

Poetic compositions, theatrical dialogue, and live folk performances.

  • Subcategory 33.01: Poetry
    • 33.01.01: Classical & Lyric Poetry
    • 33.01.02: Indian & Urdu Poetry (Ghazals, Shers)
    • 33.01.03: Modernist & Spoken Word Poetry
  • Subcategory 33.02: Drama & Theater
    • 33.02.01: Classical Tragedy & Comedy
    • 33.02.02: Modern Playwriting (Ibsen, Beckett)
    • 33.02.03: Dramatic Theory & Performance Craft
  • Subcategory 33.03: Dance & Live Performance
    • 33.03.01: Classical Dance (Kathak, Bharatanatyam)
    • 33.03.02: Contemporary & Modern Dance
    • 33.03.03: Puppetry, Street Performance & Folk Arts

Disambiguation Guidelines

When a book fits multiple folders, resolve the placement with these four rules:

  1. Primacy of Action: Place the book under the folder where you will apply the knowledge. A book on negotiating tech deals goes to Communication & Writing → Interpersonal Communication, not Law.
  2. First-Read Preference: If a book provides significant general learning heuristics (e.g., How to Read a Book), place it in Category 01, even if it discusses literature or history.
  3. Primary Focus Rule: Where does the author spend more than 50% of the pages? That domain wins.
  4. Metadata Backlink: Always place the book in one physical directory, but reference secondary categories via the tags array in metadata.json.

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