Llewellyn, Tom: - Tom Llewellyn is a writer and the author of several middle-grade novels. He lives with his wife and four kids in Tacoma, Washington. A Is for Apple, Unless . . . is his first, and hopefully not last, picture book. Mark Hoffmann is an award-winning children's book author-illustrator and fine artist whose books include Poop by Poppy Champignon. He is also a professor of illustration at Montserrat College of Art. He lives in southern New Hampshire with his wife and son.