Following Tracer and Zero-G comes Impact, the explosive conclusion to the Outer Earth trilogy - a heart-pounding thriller set in space where the hero moves like lightning and the consequences for failure are deadly.A signal has been picked up from Earth.The planet was supposed to be uninhabitable. But it seems there are survivors down there - with supplies, shelter and running water. Perhaps there could be a future for humanity on Earth after all.Riley Hale will find out soon enough. She's stuck on a spaceship with the group of terrorists that is planning to brave the planet's atmosphere and crash-land on the surface.But when the re-entry goes wrong, Riley ends up hundreds of miles from her companions Prakesh and Carver, alone in a barren wilderness. She'll have to use everything she knows to survive. And all of them are about to find out that nothing on Earth is what it seems . . .