Yesterday's completely unexpected purchase was
this edition of Lady Chatterly's Lover, entirely due to its covers and flaps being covered with delightful comics by Chet Brown, a favorite cartoonist whose distinct style bludgeoned me with its surprising presence as I walked past the "Classics" shelf.
The front cover is an illustrated excerpt from the book, the back cover is a tiny (but complete) cartoon biography of D.H. Lawrence, the front flap has a brief examination of the author's relationship with his wife and the rear flap lists his own possible extramarital affairs. Awesome! I had to buy it, both to own and to encourage more cool crap like this to exist.