Maddy, Liam, and Sal were saved from certain death to become agents for TimeRiders, a group created to stop time travel from destroying the world. When a new threat appears-with evil tracing back to World War II- the TimeRiders go back in time to Nazi Germany and then forward into an ever-shifting present, to fulfill their destinies as keepers of time.

ALEX SCARROW has been a rock guitarist, a graphic artist, and a computer games designer. He is the author of several adult thrillers, including Last Light and A Thousand Suns. This is his first series for young adults. He lives in England with his wife and son.