This guy's great. He could be my daughter's favorite author. Not that she'd admit to it.... I'm not sure she's figured out what an author is.
My favorite? The Pigeon Wants a Puppy. This picture book cracks me up. I strongly suggest you go get it from the library.
Other awesome Pigeon books-- Don't Let the Pigeon Drive the Bus; Don't Let the Pigeon Stay Up Late; The Pigeon Finds a Hot Dog.... I'm sure there's another one, but I can't think of it.
Read them with your kids.... read them even if you don't have kids (if you feel silly checking them out from the library, you can always claim they're to read to nieces or nephews or neighbors or something.)
He also has a fun book for adults-- You Can Never Find a Rickshaw When It Monsoons
It's all about his year wandering around the world after college (I think it was college). He drew a cartoon every day. Some are funny, some poignant, some I just didn't get. But hey, it was fun.