Book

Types of books according to their contents
Novels in a Polish bookstore

A common separation by content are fiction and non-fictional books. By no means are books limited to this classification, but it is a separation that can be found in most collections, libraries, and bookstores.

Fiction

Many of the books published today are fictitious stories. They are in-part or completely untrue or fantasy. Historically, paper production was expensive; too expensive to be used for entertainment. An increase in global literacy and print technology led to the increased publication of books for the purpose of entertainment, and allegorical social commentary. Most fiction is additionally categorized by genre.

The novel is the most common form of fictional book. Novels are stories that typically feature a plot, setting, themes and characters. Stories and narrative are not restricted to any topic; a novel can be whimsical, serious or controversial. The novel has had a tremendous impact on entertainment and publishing markets.[5]

Comic books or graphic novels are books in which the story is told, but not illustrated, with pictures.
A page from a dictionary

Non-fiction
An encyclopedia

In a library, a general type of non-fiction book which provides information as opposed to telling a story, essay, commentary, or otherwise supporting a point of view, is often referred to as a reference book. A very general reference book, usually one-volume, with lists of data and information on many topics is called an almanac. An encyclopedia is a book or set of books designed to have more in-depth articles on many topics. A book listing words, their etymology, meanings, etc. is called a dictionary. A book which is a collection of maps is an atlas. A more specific reference book with tables or lists of data and information about a certain topic, often intended for professional use, is often called a handbook. Books which try to list references and abstracts in a certain broad area may be called an index, such as Engineering Index, or abstracts such as Chemical Abstracts, Biological Abstracts, etc.
An atlas

Books with technical information on how to do something or how to use some equipment are called instruction manuals. Other popular how-to books include cookbooks and home improvement books.