General:
* Open Book: Represents knowledge, learning, and education.
* Closed Book: Represents mystery, the unknown, or secrets.
* Stack of Books: Represents learning, a library, or a collection of knowledge.
* Book with a Bookmark: Represents a specific point in time or a specific idea within the book.
* Torn Book: Represents the fragility of knowledge or the destruction of information.
Specific:
* Bible: Represents faith, religion, and spirituality.
* Spellbook: Represents magic, witchcraft, and the occult.
* Diary: Represents personal thoughts, feelings, and experiences.
* Atlas: Represents exploration, travel, and discovery.
* Cookbook: Represents food, cooking, and hospitality.
Figurative:
* Window to the World: Represents the power of reading to expand our understanding of the world.
* Key to Knowledge: Represents the ability of books to unlock new insights and perspectives.
* Treasure Trove: Represents the value of knowledge and the joy of learning.
Ultimately, the best symbol of a book depends on the specific message you want to convey.
For example, if you are writing about the importance of education, an open book with a shining light emanating from it might be a powerful symbol. But if you are writing about the dangers of censorship, a torn book with a hand reaching towards it might be more appropriate.