An Alien Affair - L. Ron Hubbard - Softcover 

Mission Earth #4

Minor wear along edges of covers - crease on back cover. No markings

MISSION EARTH is an epic narrative of a secret invasion of Earth as seen-and vividly recounted -- by the aliens who, unrecognized, already live and work among us. It is a novel crowded with sharply memorable characters and with places and events cloaked in splendor, menace and mystery: Palace City, Joy City, the forbidden prison fortress of Spiteos, the violent fall of the Voltar Confederation.

The Voltar Confederation has a long-range plan to use Earth as a strategic staging area in its continuing conquest of the galaxy. However, with the discovery that Earth is being destroyed by pollution, drugs and other menaces, Combat Engineer Jettero Heller is sent on a top-secret mission to save the planet from self-destruction. Unknown to Heller, another Voltarian faction (the Coordinated Information Apparatus) has secretly been using Earth as a supply base for drugs. It dispatches its own counter mission to thwart Heller's plans.