There was a lot of great stuff at Wondercon this past weekend, but there were two books that made me think, "I cannot leave this place without them".
Numero uno: Stephen Silver's "The Art of Silver". Very excellent drawings in a wide variety of styles.
Numero dos: "The Wonderful Wizard of Oz" in comic book form, adapted by David Chauvel and drawn by Enrique Fernandez. The artwork is so beautiful. I love the design of the Cowardly Lion. And it's only $10 at amazon. Go buy it!