The secrets of the black cat could fill volumes. These tomes do not reveal feline mysteries, but hold their own secret - they are actually boxes. Wooden book-shaped boxes feature Theophile Steinlen's noted "Chat Noir" Art Nouveau design. Small is 5 1/2" x 8 1/4", large is 81/4" x 10 3/4" exterior measurement. Felt-lined. Sorry, large book box no longer available.