Pssst...no one will suspect that these antique-looking books actually open up to reveal a hollow inner cavity perfect for hiding any of your secrets or treasures. Books are newly produced and have a purposely distressed exterior to provide an authentic antique look. Choose from "Specimen" (ext. dimensions: 6.5"w x 10.25"h x 2"d) or "Rowing Safety Match" (ext. dimensions: 6"w x 9.5" x 1.75"d).