Desert Disaster, livre ebook

Jimmy and Cabbie have finally warmed up after their Arctic adventure, and are amazed to be sitting on top of the Robot Races leaderboard. Jimmy's been having a great time getting to know the other racers, and he and Cabbie make a terrific team. But now they're facing their toughest challenge yet: crossing the Sahara with no navigation system. Can they make it to the finish before the others?