Beyond the Barrier by Damon Knight, Hardcover, 1964 1st Edition

Excellent condition for its age with minor wear around the edges. Pages are clean - interior and exterior. Dust jacket has minimal wear and one blemish on the front. Non-smoking home.

Synopsis:

Gordon Naismith was a physics professor at a large California university in 1980. By means of the university's duplicator, he could personally teach in nine different classrooms simultaneously. Four years before in a plane crash he had lost all memory of his earlier life. That didn't seem important until one day a very unusual student in one of his classes asked a disburbing, extracurricular question.

The question triggered a series of violent incidents, and soon Naismith himself, as well as the police, were beginning to wonder if the duplicator had reproduced him a tenth time.

The answer lay ten thousand years in the future.