1. Books are divided into social science books and natural science books according to disciplines.

2. According to the language, it is divided into Chinese documents and foreign documents.

3. According to the purpose, it is divided into ordinary books and reference books.

4. According to the content: novels; Children's books; Non-fiction; Professional books; Reference books; Manual; Bibliography; Script; Report; Diary; Book collection; A collection of photos and paintings.

5. According to characteristics: thread-bound books; Hardcover book; Paperback book; Bagged books; Electronic book; Audio book; Books for the blind; National language books.

Extended information UNESCO defines books as: all printed materials with more than 49 pages published by publishing houses (businesses), excluding the front cover and back cover, have specific titles and authors' names, and are numbered with international standard book numbers. A publication that is priced and protected by copyright is called a book.

Books are works recorded on certain forms of materials with words or other information symbols for the purpose of spreading culture. Books are the product of human thoughts, and they are a specific and developing tool for knowledge dissemination.

References:

Baidu encyclopedia-books