Button in the Fabric of Time
by Dicksion, William Wayne
Augustus Wilder, driving on a lonely mountain road, is given a time-travel device by beings from another galaxy. He is charged with the responsibility of negotiating with 31st century earthlings for their DNA. The aliens, because of atomic warfare,have mutated badly. Augustus travels a thousand years into the future where he enlists the aid of a woman of exotic beauty. Will they save humanity?