Geisel, Theodor Seuss Dr. Horton hears a who! By Dr. Seuss - London HarperCollins 1982 - 30 leaves of plates 28 cm. O A city of Whos on a speck of dust are threatened with destruction until the smallest Who of all helps convince Horton's friends that Whos really exist. 600 Lexile O Raz-Plus LC Class. No.: PZ8.G276 Dewey Class. No.: 811