About Bob Staake:

Bob Staake (born September 26, 1957 in Los Angeles, California) is an American illustrator, cartoonist, children’s book author, and designer. He lives and works in Chatham, Massachusetts on the elbow of Cape Cod. (wikipedia)

I first came to know Bob Staake through this video, were he demonstrates how he uses a subtraction process in Photoshop 3.0 to create his illustration. Visit his official website (and discover a lot more about his art).