Lois Ehlert was the author-illustrator of many picture books, including Caldecott Honor-winning Color Zoo, Leaf Man, Pie in the Sky, In My World, Growing Vegetable Soup, Planting a Rainbow, and the best-selling Waiting for Wings. Lois Ehlert was the author-illustrator of many picture books, including Caldecott Honor-winning Color Zoo, Leaf Man, Pie in the Sky, In My World, Growing Vegetable Soup, Planting a Rainbow, and the best-selling Waiting for Wings.