Lois Ehlert has created numerous inventive, celebrated, and bestselling picture books, including Chicka Chicka Boom Boom, Holey Moley, The Scraps Book, Mice, Ten Little Caterpillars, RRRalph, Lots of Spots, Boo to You!, Leaf Man, Waiting for Wings, Planting a Rainbow, Growing Vegetable Soup, and Color Zoo, which received a Caldecott Honor. She lived in Milwaukee, Wisconsin.