Spies!: David Mortimore Baxter Cracks the Case by Karen Tayleur, Brann Garvey
David and his friends invented a new spying game, but they never expected to become real-life detectives! When a classmate asks them to solve a case, they can't say no. Soon, David and his friends are swept up into a whirlwind of mysteries. David and his friends will have to become super spies to crack these mysterious cases.