Like Doctor Who? You'll LOVE the new action-packed adventure by Ali Sparkes - winner of the Blue Peter Book of the Year Award!Imagine you are the only survivor from another planet.

You've spent ten years on a spaceship learning how to be human, and now the end of your journey is in sight . . . All you have to do is land safely, convince the earthlings that you're a real teenager, and start your new life on Earth.

No problem. Except that the killer alien responsible for wiping out your people has hitched a lift. And it's just a matter of time before it starts on the human race . . .