Mr. Fixit's Lucky Day — Natalie Shaw

In this Busytown Mysteries book it seems like Mr. Fixit's lucky day! He finds a bunch of gold pirate coins in the sand of the Busytown Beach using a metal detector, and every time he picks up a coin and puts in his bag, he finds another one! But when he tries to show his treasure trove to Huckle, the coins are gone. Can Huckle, Sally, and Lowly solve the mystery?