What are the two main genres of trade books?

The two main genres (types) of trade books are fiction and non-fiction. Within each genre are sub-categories that further differentiate different types of books. Libraries use the Dewey Decimal System to categorize books. In general, fictional books are designated as E (for picture books) or Fic (for fiction) and are organized alphabetically by the authors last name. Non-fiction books include information books, folktales, and biographies. Most non-fiction is organized by subject category according to the Dewey Decimal designation.  more