Max is a young dog with a top job - he's a police dog! He lives in the village of Moorside with twins Liam and Becky Wilson - and their dad, Sergeant Wilson. With Becky's brain, Liam's luck and Max's skill at sniffing out crime, the mysteries of Moorside are about to be solved!In this book: Strange things are happening in the Moorside pet shops. Animals are being released from their cages - and dogs let out of gardens all through the village. Max soon finds the culprit very close to home . . .