I'm very sad about this and I'm going to explore a refund after Christmas. Sad because I'd been hoping to start a collection of these mugs but I'm now slightly distrustful of Art Meets Matter. I did, however, order another one (Great Gatsby) for Christmas before I noticed the crack. Fingers crossed it survives better than some of its central characters. Will keep you posted.
P.S. Body in the Library was the first 'grown up' book I ever read. I remember England were playing Australia that summer and Bill Lawry was their captain, but I can't recall 'who did it'. Don't tell me!