Lately noticed: that whenever I've come across a beautiful book from Random House, its cover has been designed by someone called Kelly Hill. I am now reading Beijing Confidential, which bears Hill's mark (which is her name and general gorgeousness). She also designed The Birth House, The Dirt on Clean, Cake or Death.
Last year the lovely Ami McKay posted an interview with Kelly Hill on her blog. Altogether unsurprisingly, Hill states, "I am drawn to book jackets that use illustrations, textures, whimsical elements -- evidence that although books are mass produced, somebody made this cover."