R.L. Stine, author of My Friend Slappy (Goosebumps SlappyWorld #12), is the creator of the bestselling Goosebumps series, which has more than 400 million copies in print worldwide. Goosebumps inspired a popular television show, as well as a feature film starring Jack Black that opened at #1 at the box office. His other popular children's books include the series Fear Street, Mostly Ghostly, The Nightmare Room, and Rotten School, and his first picture book, with Marc Brown, The Little Shop of Monsters. R.L. Stine lives in New York City. Visit him at rlstine.com, or follow him on Twitter @RL_Stine.