Operation Time Search - 63410 Author:Andre Norton "Ray Osborne is catapulted back across the centuries to an earth on which even the continents are different. It is a hostile world and Osborne's army training saves his life many times as he is captured by hunters from Atlantis, braves the dangers of the Barren Lands, and joins forces with a group of telepaths from the continent of Mu in their s... more »truggle against Atlanteans.
"As in all time travel tales, the big question is: what effect will a man thrown into the past have on the present? Will he change anything? The answer provides a twist ending which, combined with a touch of Edgar Rice Burroughs' style, puts this novel a slice above the average science fiction story."