MESA, Ariz. â€"  A first-edition copy of the Book of Mormon that draws hundreds of missionaries to an Arizona bookstore has gone missing.

The Arizona Republic reports that Mesa police are investigating the disappearance, which happened sometime during the Memorial Day weekend.

Helen Schlie, owner of Rare and Out of Print Books and Art, says the last time she saw the book was when she put it away in a fireproof box Friday night. She says it wasn't discovered missing until Monday afternoon when two Mormon missionaries stopped by asking to get pictures taken with the book.

Schlie says the book is worth $100,000 but isn't insured.

She says it's well-known throughout the nearby Mormon community that the store had an original copy.