I plan on making these posts a regular thing, but as a list. However, for the first one I can't help but give this lady the whole thing.
Book Covers desgined by Coralie Bickford-Smith.
I first saw her work on the Design Sponge website several years ago. She is a designer for Penguin Books in the UK, but now her designs are available here in the US as well.
I'm particularly fond of her Boy's Adventures and Sherlock Holmes series, but her Recovered Classics seem to be the most popular. Now, in April she has a new collection of books about food that are just beautiful (and smart--the patterns used come from the period when the book was written).
You can see more of her work on her website and purchase almost all of her designs on Amazon (just type in her name).