Secret agent Jack Stalwart searches for a diver missing from the Great Barrier Reef and a treasure that has vanished from the wreck of the HMS Pandora while trying to defeat a deadly band of pirates.

Nine-year-old secret agent Jack is called to China find a giant panda kidnapped from the Wolong Nature Reserve before the evil Scorpion Gang attempts to sell it on the black market.

"The Global Protection Force has summoned Secret Agent Jack Stalwart to Mexico to hunt down a stolen map leading to hidden Aztec gold. Suddenly, he finds himself trapped in the hands of one of the most treacherous hunters in the world. Can Jack stop Callous Carl and his band of thieves before they plunder again?"--p.[4] of cover.

Jack is transported to Russia to find the whereabouts of a key aerospace engineer, who turns out to be his father, before the launch of the first manned mission to Mars. "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 is going to live to regret it. Can Jack keep his cool to save the day?..."p.[4]...

"Meet Jack and Max Stalwart, Code Names: Courage and Wisdom. Jack and Max are ordinary kids who become secret agents by night, thwarting evil and saving priceless treasures as they solve mysteries around the world. Destination: Brazil. 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....

In this page-turning new adventure series, nine-year-old secret agent Jack Stalwart travels the world in search of his lost brother while solving thrilling international crimes. The pulse-pounding adventures accompany fascinating geographical, cultural, and historical facts.

The crown jewels have been stolen and Secret agent Jack Stalwart must battle a master magician to save them before they disappear forever.

A team of GPF scientists has vanished in the Arctic while doing research on global warming. While rescuing them from the jaws of a hungry polar bear, nine-year-old secret agent Jack Stalwart learns of the malicious Black Arctic Project - a group of mysterious villains are speeding up global warming by blowing up glaciers. Can Jack stop them before the entire planet is doomed?

Spy Jack Stalwart must stop the poachers in Kenya