Personalized Book Monster Girl Toddler Long Sleeve T-Shirt. Toddler Long Sleeve Tee - Black with funny green girl monster wearing glasses, reading a book says BOOK MONSTER. Cute back to school gift for book worms, book nerds and book lovers. A classic for Fall, Winter and Spring, these long sleeve toddler t-shirts are sure to be a staple in your child's wardrobe. Whether layered or alone, this t-shirt is soft yet durable enough to stand up to your toddler's playtime demands.