Elizabeth Singer Hunt

Jack is an ordinary kid who becomes a secret agent by night, thwarting evil all over the world as he searches for his missing brother, Max....

Temporarily retired from the GPF and on family vacation, Jack Stalwart and his older brother, Max, are motivated to act when a band of thieves takes the Emerald Buddha....

Jack is an ordinary kid who becomes a secret agent by night, thwarting evil all over the world as he searches for his missing brother, Max....

Some of England’s most prized possessions, the Crown Jewels, have been stolen from the Tower of London....

Under the cover of darkness, a band of ninja thieves has stolen some of Japan’s most priceless treasures, including an ancient samurai sword....

Jack joined the Global Protection Force for two reasons: to thwart evil around the world and to rescue his brother, Max, who went missing while working as a GPF agent....

Meet Jack Stalwart. Code name: COURAGE. Jack is an ordinary kid who becomes a secret agent by night, thwarting evil all over the world as he searches for his missing brother, Max....

Jack is an ordinary kid who becomes a secret agent by night, thwarting evil all over the world as he searches for his missing brother, Max.

Destination: Nepal. A plane carrying a team of scientists has gone missing over Mount Everest....

Meet Jack Stalwart. Code name: COURAGE. Jack is an ordinary kid who becomes a secret agent by night, thwarting evil all over the world as he searches for his missing brother, Max....

Charley, Oscar, Robbie, and Jules are ordinary 12-year-old kids. That is, until they uncover the long-lost treasure map of the notorious pirate, Jean Lafitte....

Secret agents Jack and Max Stalwart are sent to the Amazon jungle to investigate the disappearance of an important Global Protection Force scientist. Soon, they discover that the scientist's disappearance is no accident....

The Global Protection Force has summoned Secret Agent Jack Stalwart to Mexico to hunt down a stolen map leading to hidden Aztec gold....

Meet Jack Stalwart. Code name: COURAGE. Jack is an ordinary kid who becomes a secret agent by night, thwarting evil all over the world as he searches for his missing brother, Max....

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....

A team of GPF scientists has vanished in the Arctic while doing research on global warming....

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....