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?
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 thie...
On the eve of the first manned mission to Mars, a madman has kidnapped the space project's chief engineer. Can secret agent Jack Stalwart save the day and keep his cool when he finds out who the missing engineer is?
On the eve of the first manned mission to Mars, a madman has kidnapped the space project's chief engineer. Can secret agent Jack Stalwart save the day...
