IT HAPPENS SO QUICKLY: a car shoots out from the curb, hits Fiona’s father and then speeds away. Is it an accident? Or is it a warning to Fiona and her Canadian cousin, Gavin, to turn back? Gavin is in Scotland to hike across the moors, and Fiona’s dad isn’t about to let a broken leg stop the kids’ fun. Fiona and Gavin will go on without him.

A broken leg turns out to be the least of their troubles as the cousins unwittingly stumble onto a monstrous conspiracy to kidnap a girl—and get caught by the conspirators. Managing to escape, Gavin and Fiona suddenly find themselves in the middle of a plot to assassinate a royal family member. With his trademark high energy style and heart-stopping pacing, Robert Sutherland has written another super adventure-thriller sure to grab his many middle-grade fans.