(He's the guy who did those cool writer murals in the Barnes & Noble coffee shops, in case you don't know who he is). Of course he's also done so much other amazing work. He is in the 'god' category of illustrator, with many well-deserved awards to his name.
I remember back in school we somehow acquired a small traveling exhibit of award winning illustrations, and one of them was his illustration of Stevie Ray Vaughn. I stared at it a long time over many days.
I've pulled these neat little videos straight off of Jeffrey Brian Fisher's blog (who is no slouch of an illustrator himself). I hope he won't mind. I couldn't resist sharing.
You can order a full length version of the first one from Massive Black, a place I'd never heard of, but they have a lot of cool art videos.
I have a couple of picture books by him - The Legend of Sleepy Hollow, and Bloshblobberbosh, which seem to be hard to find now.
You can see more of his work here.