A summer holiday by the sea beckons for the Jinks family, and of course Ben is bringing Stinky, his genius of a hamster, along with him. But a trip to the local museum uncovers the mystery of long-lost stolen diamonds and a map. Does "X" really mark the spot? And can Stinky and Ben find the hidden loot before the crooks track it down? The fifth in the acclaimed Stinky & Jinks series has all the hallmark hilarity, warmth, and exciting adventure that readers have come to expect from Dave Lowe.