An ancient stone with the location of Aztec treasure has been stolen from an ailing man's bedside table. Can Secret Agent Jack Stalwart track the thieves and stop them before they plunder Moctezuma's gold?
A group of scientists have gone missing in the Arctic - could this be linked to their research into global warming? Jack must face the harsh weather and a very hungry polar bear to find out . . .
The Mona Lisa, the most famous painting in the world, has been stolen from the Louvre museum in Paris. Can Secret Agent Jack Stalwart find it before an evil thief takes it out of the country, never to be seen again?
An eager young scientist has brought to life a dangerous flesh-eating dinosaur by crossing its DNA with that of his pet dog, Freddie. Can Secret Agent Jack Stalwart capture the dinosaur before it destroys New York City?