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! Jonah's little sister loves her cute Wolfling—a robotic stuffed wolf. But Jonah isn't sure it's as harmless as it seems. Jonah has heard rumors about Wolflings. They can move without being switched on. They can turn nasty. And they can bite....