Visitors : (the Resistance Trilogy)

The Visitors is the first book in a three part series created for the young, teenage sci-fi audience. It portrays the story of an alien survivor coming to Earth. He has come to save humankind from extinction by the parasitic conquering alien race that destroyed his world. He vowed to do everything in his power to stop them from taking another world after they took everything from him. A group of high school kids stumble upon him and that leads to a change in their destinies beyond anything they could have imagined. It's a race against time to discover the truth of who is human and who is not.