When Tom and Jamie hear a report that a scientist has proof of human existence in dinosaur times there are only two possible explanations-either someone else has been into their secret dinosaur world, or they must have left something behind on their travels. Either way, the boys know they have to get back to the Jurassic and find out what's happened. But once in the Jurassic, disaster strikes when a pair of pterosaurs swoop down from the sky and grab Tom in their claws! As they carry him off over the treetops, Jamie and Wanna race after him-but it's no good, Tom is soon out of sight and they wonder if they'll ever see their friend again. With a pack of Megalosaurs on the prowl, a prehistoric storm on the horizon, an enormous landslide and a mystery to solve - this is a breathtaking, double length adventure that readers will never forget.