Timeliner

From the flaps of the Rinehart first printing: "All the laboratory animals used to test the dimensional quadrature device had perished. But Dr. Hugh Macklin was determined to run a low-power test with himself as subject, unaware that one of his associates - and his own wife - had arranged to kill him during the experiment. Seconds after the switch had "accidentally" been thrown to full power, Macklin found himself eighty years in the future with a new body and name - on the moon! It wasn't until he arrived at a point many thousands of years in the future - after several hair-raising adventures - that Macklin encountered a civilization advanced enough to tell him what he was, what had happened. He had become one of the ten or so Timeliners of the universe, a "psychotemporal parasite," whom death could not destroy but only send farther into the future to take over someone else's identity. In all of Macklin's adventures over millennia, there was the "fatal affinity" for the woman who most resembled his wife, Lydia. Ultimately, time being a curve and not a straight progression, he finds himself in the most fantastic possible position, listening to the story of his own murder!"