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, Secret Age

Jack finally receives a coded message from his brother Max, possibly detailing his whereabouts. But duty calls, and Jack is whisked away to the sweltering savan

With no word from his missing brother Max, Jack Stalwart can only think the worst when the director of the Global Protection Force summons him to its top-secret

In The Caper of the Crown Jewels, Jack is summoned to solve a matter of grave national importance: the theft of the Crown Jewels of the British Empire from the

"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 r