Theo. LeSieg is a pseudonym for Theodor Seuss Geisel--aka Dr. Seuss--one of the most beloved children's book authors of all time. From The Cat in the Hat to Oh, the Places You'll Go!, his iconic characters, stories, and art style have been a lasting influence on generations of children and adults. The books he wrote and illustrated under the name Dr. Seuss have been translated into over 30 languages. Hundreds of millions of copies have found their way into homes and hearts around the world. His long list of awards includes Caldecott Honors for McElligot's Pool, If I Ran the Zoo, and Bartholomew and the Oobleck; the Pulitzer Prize; and eight honorary doctorates. Works based on his original stories have won three Oscars, three Emmys, three Grammys, and a Peabody. Joe Mathieu has illustrated countless books for children, including Big Frank's Fire Truck, Sesame Street titles, books in the Cat in the Hat's Learning Library series, and many more.