The Alpha's Secret Luna
My mother was rarely wrong about anything.
I'm not surprised to see a copy on her shelves, but three? One copy is a paperback with a well-crackled spine, and another is a fancy leather-bound gold filigree type thing sitting on a shelf with similar collectible books, but it's the third that catches my eye. It looks new, it's oversized, and it's stuck on the highest shelf.
As I retrieve it, I'm surprised at the strange feeling of something moving inside the book. Flipping it open, I discover the insides of the book are carved out and glued together to create a compartment inside where sits a small dark key.