The Hunt for the Yeti Skull (Book 13) Jack has become the most decorated secret agent for the Global Protection Force, but during the day he's still just an ord

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

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

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

Jack Stalwart may be a top rock climber, but no amount of practise can prepare him for the most gruelling climb of all: Mount Everest. When a skull believed to