When does Dr. Seuss's Horton! return?

Horton Hears a Who! is a children's book written and illustrated by Theodor Seuss Geisel under the pen name Dr. Seuss. This book tells the story of Horton the Elephant and his adventures saving Whoville, a tiny planet located on a speck of dust, from the animals who mock him. Horton endures harassment to care for and ensure the safety of the Whos, who represent the insignificant. "A person's a person, no matter how small" is the most popular line from the book.