These 11 top‑level categories mirror how people think about books. Each contains logical subcategories. We will expand or collapse as our collection grows.
1. History & Geography
- World History (general)
- Indian History
- Pakistan History
- South Asian History
- Russian History
- Chinese History
- Ancient Civilizations (Egypt, Greece, Rome, Mesopotamia, Indus Valley, China)
- Medieval History (500–1500)
- Early Modern History (1500–1800)
- Modern History (1800–present)
- Military History (wars, battles, strategy)
- Political History (revolutions, treaties, governments)
- Social & Cultural History (everyday life, customs, traditions)
- History of Science & Technology
- Historical Geography & Maps
- Biographies of Historical Figures (non‑scientists)
- Local / Regional History
2. Science & Mathematics
- Mathematics
- Algebra, Calculus, Geometry, Number Theory
- Statistics & Probability
- Applied Mathematics
- Physics (classical, quantum, relativity, thermodynamics, astrophysics)
- Chemistry (organic, inorganic, physical, analytical)
- Biology (botany, zoology, microbiology, genetics, ecology, evolution)
- Earth Sciences (geology, meteorology, oceanography, paleontology)
- Astronomy & Cosmology
- Scientific Methodology & History of Science
3. Technology & Engineering
- Computer Science (algorithms, programming, software engineering)
- Data Science (data mining, machine learning, big data, visualization)
- Artificial Intelligence & Robotics
- Electrical & Electronic Engineering
- Mechanical & Civil Engineering
- Chemical & Materials Engineering
- Biotechnology & Biomedical Engineering
- Environmental Technology
- Transportation & Aerospace
4. Literature & Fiction
- Fiction by genre (literary, historical, science fiction, fantasy, mystery, thriller, romance, horror)
- Poetry
- Drama / Plays
- Short Stories
- Folklore & Mythology
- Literary Criticism & Theory
- National / Regional Literature (e.g., English, French, Urdu, Chinese, etc.)
5. Philosophy & Psychology
- Philosophy
- Ancient (Plato, Aristotle, Confucius)
- Medieval & Renaissance
- Modern (Descartes, Kant, Nietzsche, existentialism)
- Ethics & Moral Philosophy
- Political Philosophy
- Epistemology & Metaphysics
- Logic
- Eastern Philosophy (Buddhism, Taoism, Hinduism)
- Psychology
- Cognitive, developmental, social, clinical, behavioural
- Psychoanalysis (Freud, Jung, Lacan)
- Neuroscience & mind‑brain connection
6. Arts & Entertainment
- Visual Arts (painting, drawing, sculpture, photography)
- Architecture
- Music (theory, history, composition, instruments)
- Performing Arts (theatre, dance, film, opera)
- Design (graphic, fashion, industrial)
- Crafts & Hobbies
7. Biographies & Memoirs
- Scientists & Inventors
- Artists & Writers
- Philosophers & Thinkers
- Political Leaders & Rulers
- Business & Technology Leaders
- Explorers & Adventurers
- Athletes & Entertainers
- Collective biographies (e.g., “Women in Science”)
8. Reference & Guides
- Encyclopedias & Dictionaries
- Atlases & Gazetteers
- Almanacs & Yearbooks
- Style Guides (e.g., Chicago, APA, MLA)
- How‑to & DIY (general)
- Study Guides & Exam Preparation
- Genealogy & Heraldry
9. Society & Social Sciences
- Sociology
- Anthropology
- Economics (micro, macro, development, behavioural)
- Political Science (theory, comparative politics, international relations)
- Law & Legal Studies
- Education
- Communication & Media Studies
- Gender & Sexuality Studies
- Race & Ethnicity Studies
10. Business & Management
- Entrepreneurship & Startups
- Leadership & Management
- Marketing & Sales
- Finance & Accounting
- Operations & Supply Chain
- Organisational Behaviour
- Business Ethics
- Project Management
11. Health & Wellness
- Medicine (general, history of medicine)
- Nutrition & Diet
- Fitness & Exercise
- Mental Health (self‑help, therapy)
- Alternative & Complementary Medicine
- Public Health & Epidemiology
- First Aid & Safety