The fourth book in the best selling Maximum Ride series, now in paperback. Description of book Max, Fang, Iggy, Nudge, Gazzy and Angel are six extraordinary kids created by the crazed Uber Director in a twisted laboratory experiment that left them with the ability to fly. They are back for another wild adventure as they try to save the world . . . and themselves.

The Uber-Director sees the group of friends as his opportunity to become a billionaire: he seizes his chance to cash in by planning a worldwide auction with the children being offered to the highest bidder. But first his mutant army must track them down and capture them - which won't be easy.

Meanwhile, in hiding from their predators, all six of them wake one evening to find they are being given an important mission - to save the world from global warming. Led by heroine Max, their task takes them in a fast-paced, high-speed chase across the world to the South Pole but, as ever, danger is never far away . . .