Discover the bone-chilling adventures that made Goosebumps one of the bestselling children's book series of all time. Now with all-new bonus materials!Camp Jellyjam is no ordinary sports camp. The counselors seem a little TOO happy. And why are they so obsessed with winning? It might have something to do with the hideous, slimy discovery lurking in the darkness....It's our ninth fan-favorite prequel to R.L. Stine's blockbuster Goosebumps HorrorLand series. Now with all-new bonus features including an author interview, bizarre sports trivia, and more!