The Hollow Book Company makes modified books with hidden compartments in them, complemented by matching whisky flasks, which can be custom-laser-etched or skinned with full-color vinyl adhesive.
Alas, we've already missed out on the Gray's Anatomy flask/book, but there's still The Art of War, a leather-bound edition of Poe's Tales of Mystery and Imagination, Dracula, Shulz and Peanuts, Who-ology with Tardis flask, and many more!
(via Geekymerch)