It's Halloween in the 13th Classroom--what could go wrong? Well, for starters, all of the students could magically turn into their COSTUMES! You might think this was hilarious, but it was horrible. With tricky transformations come wild werewolves, voracious vampires, zany zombies, and other moody monsters. As the students of Classroom 13 are about to learn, Halloween's treats are sometimes tricks.