Really lovely cover for "A Fraction of the Whole" by Steve Toltz, designed by Nathan Burton. I really love this design and think it is successful because it makes me want to read the book.
After Googling the book, I found a few examples of the cover with blue instead of pink under the die-cutting. I think the pink works better with the sepia-toned image, though.
Burton went through a few different stages, and completely different designs before reaching the final. To see his first four attempts, click through the jump. To read an interview with Burton about his process on designing the cover, visit Faceout Books.
(images from Faceout Books)