"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] of cover.

Nine-year-old secret agent Jack must rescue an archeologist working at Angkor Wat and prevent her kidnapper from using the power of the antiquities she was guarding for evil.

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

When a plane goes missing over Mount Everest, Jack and his fellow agents must brave the highest mountain on Earth to recover its cargo--the first true yeti skull ever recovered.

Under the cover of darkness, a band of ninja thieves has stolen some of Japan's most priceless treasures, including an ancient samurai sword. Can Secret Agent jack Stalwart take on the gang before the treasures are lost forever?

Destination: Egypt. The Global Protection force refused to share any details with Jack about his brother's whereabouts, but on two previous missions, Jack had collected clues that pointed to Max being in Egypt. Now Jack has reason to believe that King Tut's diadem -- a crown thought to have magical powers -- is the cause of Max's disappearance. Can Jack prevent an ancient and terrible curse of the pharaohs from wreaking havoc and finally save Max?...

Destination: Nepal. A plane carrying a team of scientists has gone missing over Mount Everest. They were thought to be carrying the first true Yeti skull ever recovered -- proof that the Abominable Snowman really existed. Can Jack and his fellow agents use their climbing skills to brave the highest mountain on earth and recover the priceless skull?

Destination: Mexico. 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 treasure hunters in the world. Can Jack stop Callous Carl and his band of thieves before they plunder again?