I recently received a copy of the terrific collection of Chip Kidd's book covers (Chip Kidd: Book One: Work: 1986-2006 (Chip Kidd)). It's a great bargain for me because I'm constantly tempted to buy books just for their covers. Anyway, I love the cover you see above, but is it just me, or does it remind you of a certain Scooby-Doo villain?
Here's the Amazon link: Sir Gawain and the Green Knight. And here's more book covers.