Even the king of Didd's most able wise men and sorcerers cannot take off all 500 of Bartholomew's hats. In the sequel, Bartholomew and the Oobleck (Random, 1949), Bartholomew saves the kingdom from sticky green oobleck that falls from the sky. Bartholomew and the Oobleck was a Randolph Caldecott Medal Honor Book, 1950. Recommended.Dr. Seuss is the author of 'The 500 Hats of Bartholomew Cubbins (Classic Seuss)', published 1989 under ISBN 9780394844848 and ISBN 039484484X.