It is simple drawing but creative. The designer made the image by using lines with thread? Natural colors gives clamming quality and peaceful feeling. "Explore, explore, explore - until there's nothing more.
This book cover shows excellent figure ground/negative space. The contours formed by the position of the fox serve as the shape of a boy, I'm assuming "Peter." This empty space also creates a wonderful focal point for the book title to nestle into.
Book design with matchbook surface spine - Fahrenheit 451 is a dystopian novel which presents a future American society where books are outlawed and firemen burn any house that contains them. By Elizabeth Perez. Such a cool book design!