Probably most famous for his various illustrations and painting of wildlife, Charley Harper was an American artist with a great sense of modern style. Old Navy, of all places, recently had a whole collection of toys and games using Harper illustrations, including a coloring book, matching game, and animal/letter cards. I fortunately picked them up on clearance (there’s still time!).
You can also pick up the “Charley Harper: An Illustration Life” put together by Todd Oldham(!). Now if I only at $125….