The dimensioneers
Doris Piserchia
the Scorpio Illusion (1993)
Ludlum, Robert
The Tinker's Girl
Catherine Cookson
Iota 7
Joseph Vermette
Savage Pellucidar
Edgar Rice Burroughs & Harry Turtledove & James Allen St. John
Tanar of Pellucidar
Edgar Rice Burroughs & Paul Cook