Melvil Dewey - the librarian who created the Dewey Decimal System to organize information into ten major subject areas.
Fiction Books are stories made up by the author about imaginary people, places and or events.
Fiction books are shelved by author's last name.
Non Fiction Books are true books about real things, people, places and events.
Dewey gave each subject a number. This number is known as the call number. A call number; like an address, tells where the book can be located in the library. His system uses letters and numbers, which make sure that books of the same topic are placed together on the shelf.
How To Read The Call Number
http://www.basdk12.org/Page/7258
Dewey Decimal Categories
https://thelibraryand.wordpress.com/tag/dewey-decimal-classification/