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

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

In The Escape of the Deadly Dinosaur, Jack zooms to the city that never sleeps to try to solve the mystery of the missing Allosaurus toe. Starting at the Natura

For fans of the award-winning SECRET AGENT JACK STALWART comes a must-read new chapter book series! Now Jack teams up with his older brother, Max, to solve new

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