The Nightmare Club is not for just ANYBODY. Only the spookiest, scariest stories get told at Annie's Halloween sleepovers—and if you can't take it, well, tough! All the neighborhood kids hate Dervla, the meanest babysitter ever. She is very strict, eats spiders, and...are those horns? Only Becky has guessed Dervla's dark secret. And she becomes everybody's hero when she manages to rid the neighborhood of the demon babysitter. Don't ask how, but pssst, it just might involve vomit-colored stink bombs, an abandoned shed, and demon-food. You have been warned.