My Mom had a book safe for emergency cash!
They've been around probably since bound books were first developed.
Any way, love what you did.
I do Altered Books and I recently got a <i>nook</i> e-reader. My plan is to make a book safe-style cover to protect it from the wilds of my purse.
I already have the cover from an old journal I made years ago.
(Might post pictures when it's done! )