Personalized Book Monster Girl Youth Long Sleeve T-Shirt. Youth Long Sleeve T-Shirt - White 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. youth long sleeve t-shirt. Shoulder-to-shoulder taping. Youth: S(6/8), M(10/12), L(14/16), XL(18/20)