Whoville, sometimes written as Who-ville, is a fictional town created by author Theodor Seuss Geisel, under the name Dr. Seuss. Whoville appeared in the 1954 book Horton Hears a Who! and the 1957 book How the Grinch Stole Christmas!; with significant differences between the two renditions. Its denizens go by the collective name Whos, as in a plural form of the pronoun who.