Read the Grammarly article and an article on Bookriot's site on fiction vs. nonfiction. Then go to Storyboard That and learn about the portion of nonfiction known as reference books.
Take a virtual tour of one of the following libraries.
Los Angeles Central Public Library
The Bodleian, Oxford University (Hogwarts’ library in the Harry Potter films)
Review this Slide deck (slideplayer) on biography vs. autobiography.
Watch this fiction vs. nonfiction rap battle.
Watch this informational video on fiction and nonfiction genres and text features.