From the inside flap of the Ace Double editions
A STITCH IN TIME SAVES. . . ?
"He had a moment of shattering, blinding terror. . . Where was he? Why was he here? Had somebody brought him here, dumped him off at this spot for a reason?" Suddenly Dr. Jim Parsons realized that he had not been dumped on a new world-but into a new time. In seconds he had traversed centuries. . . but why? How could he escape the time he was in? How could he avoid the terrible role that the Wolves of the future had chosen him to execute? There was no way out, for even death was humbled before the inexorable web of destiny.