Ross Murdock, a convicted criminal is a "volunteer" for a secret government project: Operation Retrograde. Unwilling at first, but with increasing fervor, Murdoch becomes a member of the team fighting the strangest battle of the Cold War.
The Russians have infiltrated an unknown era of the past and developed powerful new weapons by utilizing some lost technology. American scientists also have the means to transport men into the past, and it becomes imperative that Operation Retrograde succeed in finding and tapping the source of the Russian's secret weapons.
Murdock and the other members of his team embark on a dangerous and frantic search of almost-forgotten time periods in a Cold War where the Past has become the battlefield of the Future.
Andre Alice Norton (1912-2005) was an American science fiction and fantasy author (with some works of historical fiction and contemporary fiction) under the noms de plume Andre Norton, Andrew North and Allen Weston. Norton published her first novel in 1934, and was the first woman to receive the Gandalf Grand Master Award from the World Science Fiction Society in 1977, and won the Damon Knight Memorial Grand Master Award from the Science Fiction and Fantasy Writers of America (SFWA) association in 1983.
Andre Norton. Wikipedia.