Readers spend the day with second-grader Marvin Monster and his friends, werewolves, goblins, and banshees, from Grim Castle Elementary School as they go on a field trip around their town called Marshville. Marvin learns an important lesson about the importance of not listening to rumors. Book 2 in a series that teaches important social skills. Kids will learn an important lesson from this charmingly gruesome monster and his friends.In Marvin's monsterific world, bats sort mail at the post office, chomping gators recycle trash at the recycle center, and flying gremlins reshelve books in the library. Not since the Adams Family has a group of characters grabbed readers young and old alike.