Elizabeth Singer Hunt: 18 books

Destination: Russia. On the eve of the first manned mission to Mars, Secret agent Jack Stalwart learns that the mission's chief rocket engineer has disappeared. When he finds out that engineer is his father, Jack vows the kidnapper will live to regret it. Can Jack keep his cool to save the day?

Jack finally receives a coded message from his brother Max, possibly detailing his whereabouts. But duty calls, and Jack is whisked away to the sweltering savannah of Kenya before he can decipher it. Once there, a wise and kind Masai chief alerts Jack to a series of elephant killings where the corpses...

Destination: Italy. Jack's car-racing hero, Morgan Parks, is in danger. Someone has already tried to kill him once, and they're about to try again. Can Secret Agent Jack Stalwart save his idol and the Italian team's chance to win the Monza Grand Prix?

For fans of the award-winning SECRET AGENT JACK STALWART series comes a must-read new chapter book series! Now Jack teams up with his older brother, Max, to solve new international mysteries, using their special training as secret agents. Secret agents Jack and Max Stalwart are sent to the...