Far Shore of Time

SF Grandmaster Frederik Pohl tops himself once again with the fantastic climax to the story begun in The Other End of Time and brought to a boil in The Siege of Eternity. When the Horch set free the copy of Dan Dannerman theyd been holding on one of their worlds, little did they realize that he would soon lead an attack on the Beloved Leaders. The attack not only succeeds, but gives Dannerman control of technology previously known to the alien enemy. Returning to Earth, its up to Dannerman, all three of him, to figure the ins and outs of the alien technology in time to stave off the imminent destruction of Earth.