By Des Hunt
Max and Jensen are high achievers who have weekly maths tutoring from Professor Mayhew. But when Professor Mayhew disappears in a very public way, the boys – joined by classmate Cleo – try to work out what has happened, and follow his clever clues to create his cold fusion experiment, with which they hope to win the ExpoFest science fair. Bravery and brains in equal parts. Ages 10+.