Jack Stalwart, an ordinary boy who fights evil as a secret agent by night, must track down the missing chief rocket engineer in charge of the first manned mission to Mars, who also happens to be Jack's father.
Secret agent Jack Stalwart travels to Mexico to recover a stolen map that reveals where to find hidden Aztec gold, but Callous Carl and his thieves step in to make things more difficult.
Jack Stalwart, an ordinary boy who fights evil as a secret agent by night, while looking for his brother Max, receives a coded message and is called away to stop poachers from killing elephants in Kenya for their ivory tusks.
"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.
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.
