I love it when artists play with nature in their work. In particular I have a thing for that kind of art that puts nature into a different perspective and makes you look at it in another way. A selection of artists have done exactly.
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.