13 book set. Includes: Monsters in the Dark, Monsters on the Loose, Monsters to the Rescue, Monsters on a Plane, Monsters go Party, Monsters on the Move, Monsters at the Museum, Monsters at Halloween, Monsters at the Beach, Monsters go Camping, Monsters at Christmas (UK version), Monsters go Green, Monsters go to Hospital (UK version). All Like new! Great reads for ages 5-7.