Nonfiction (noun)

1. Prose writing that is not fictional; also : such writing organized into books.
2. Writing that is true and factual as opposed to fictional.

Origin:

Non- + fiction.

Examples:

1. He specialized in writing nonfiction books on history.
2. The bookstore had a large section devoted to nonfiction.
3. She was reading a nonfiction book on the history of science.
4. The nonfiction section of the library was filled with books on various subjects.
5. The nonfiction category of the awards was won by a book about the economic crisis.