As part of Assigning ISBNs to your eBook and Paperback, you’ll choose a primary and secondary subject for your book, from a list of subject categories.
As of this writing, Bowker, the USA ISBN Agency, provides this list of Subjects to choose from:
- Agriculture
- Architecture
- Art
- Astrology
- Australia_History
- Bible_Commentaries
- Biography
- Business
- Canada_History
- Children’s Fiction
- Collectors and Collecting
- Comics and Graphic Novels_General
- Computer Software
- Computers
- Cooking
- Crime
- Curiosities and Wonders
- Drama (Dramatic Works By One Author)
- Drama_Collections
- Drama_History and Criticism
- Economics
- Education
- Family
- Fiction_Action and Adventure
- Fiction_Erotica
- Fiction_Espionage
- Fiction_Fantasy_General
- Fiction_Gay
- Fiction_General
- Fiction_Historical
- Fiction_Horror
- Fiction_Mystery and Detective_General
- Fiction_Psychological
- Fiction_Religious
- Fiction_Romance_General
- Fiction_Science Fiction_General
- Fiction_Short Stories (single author)
- Fiction_Suspence
- Fiction_Thrillers
- Fiction_Visionary and Metaphysical
- Fiction_War and Military
- Fiction_Westerns
- Finance, Personal
- Games
- Gardening
- Genealogy
- Great Britain_History
- Handicraft
- Health
- Interior Decoration
- Internet
- Interpersonal Relations
- Language and Languages_Study and Teaching
- Language Arts
- Law
- Literature_Collections
- Literature_History and Criticism
- Mathematics
- Medicine
- Military Art and Science
- Mind and Body
- Music
- Nature
- New Zealand_History
- Nutrition
- Parenting
- Performing Arts
- Pets
- Philosophy
- Photography
- Physical Fitness
- Physics
- Poetry (Poetic Works by One Author)
- Poetry_Collections
- Poetry_History and Criticism
- Political Science
- Psychology
- Reference Books
- Religion
- Science
- Self-Helpl Techniques
- Social Sciences
- Spirituality
- Sports
- Technology
- Transportation
- Travel
- United States_History
- Wit and Humor
- World History