Logan's Search (Logan's Run, #3)

Logan is running again, with the fate of the world in his hands. Earth is free and at peace at last. But not the Earth on which Logan stands. For him a nightmare has just begun...In the 23rd century on Parallel Earth your 21st Birthday is your Lastday. Parallel Earth is a dazzling paradise of pleasure and infinite joy. Here, in a terrifying computerized society controlled by ruthless police assassins, is the world that Logan once destroyed. Now his fate is to live that horror once again.