1, by subject: social science and natural science books.

2. According to genre: Chinese documents and foreign documents.

3. According to the purpose: ordinary books and reference books.

4. Divided by content: novels, children's books, non-fiction, professional books, reference books, manuals, bibliographies, scripts, reports, diaries, book collections, photography and painting collections, etc.

5. According to the characteristics, it is divided into thread-bound books, hardcover books, paperback books, bagged books, e-books, audio books, books for the blind, and national language books.

Extended data:

The elements of a book:

1, there must be knowledge and information spread.

2. There should be text and image signals to record knowledge.

3. There should be a material carrier for recording text and image signals.

4. The production technology and craft of books are also the basic conditions for producing books.

Baidu encyclopedia-books