Out of print for more than forty-five years, this thrilling novel from the best-selling master of science fiction and fantasy follows a Terran agent as he searches for the secret of The Door Through Space while navigating a deadly planet known as Wolf - a deadly world under a cold red sun, old when Terrans were learning to walk upright. Only one Terran agent knew Wolf well enough to pass undetected - but he had ruined his usefulness long ago. And yet only this scarred and bitter man could discover the secret of The Door Through Space…
- Cat. No.