This is a series of three book covers for stories by Neil Gaiman. Gaiman is an author of fantasy 

books in which each story contains two realms. The illustrations on the covers are inspired by
the idea of showing the contrast of these two realms. The back covers have famous quotes
from the book, as well as one of the central elements from each book.
For example: Coraline finds a key and crosses through a small door into a place that looks like
her own house, yet eerie.