The Altech Assassin

Altech is a volatile mud-covered planet that was colonized after its climate was artificially altered to support human life.  One hundred years later Earth has sent its forces to establish authority and control over the planet.  Descendants of the original colonists, known as the Altech, have unified under a totalitarian ideology of racial purity. They have declared war against the forces from Earth. Adrian and Neil are military couriers from Earth who must travel to the war-torn planet of Altech to deliver details of secret plans that may change the outcome of the war.  They are unaware that an Altech assassin is waiting for them to arrive.  This assassin is a charming but ruthless agent who is unstoppable.  He has never failed in a mission.  Adrian and Neil must be on guard with everyone they meet as the assassin takes the place of one of their trusted contacts.