Time-travel for archaeologists was a well-guarded secret... but when the remains of an interstellar spaceship are uncovered along with the usual fossils, the time agents must call on a modern Apache Indian, Travis Fox, to guide them in the ways of his ancestors in their trip to the past.
But the explorers become trapped in space as well as time, on a mad journey in an automatic starship; not even Travis Fox can tell whether any of them will ever see Earth again.
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.