How I Got My Shrunken Head by R. L. Stine
Reader beware, you're in for a scare...Discover this spine-chilling prequel to the all-new Goosebumps HorrorLand series. What has two eyes, a mouth, and wrinkly green skin? Mark's shrunken head. It's a present from his Aunt Benna - a gift from the jungle island of Baladora. And Mark can't wait to show the kids at school. But it's no ordinary shrunken head. Late one night it starts to glow and it gives Mark a strange power. A dangerous power.