William Kotzwinkle is the author of eighteen children's books, including Walter the Farting Dog, The World is Big and I'm So Small, Tales from the Empty Notebook, The Nap Master, E.T. The Extraterrestrial and E.T. The Book of the Green Planet. His books for adults include The Bear Went Over the Mountain, The Fan Man, Fata Morgana, and Doctor Rat. His books are published all over the world.
Joe Servello has illustrated many of William Kotzwinkle's books for children and adults, including their best-selling Trouble in Bugland.