Doorway into Time: The Outer Twilight Series, Volume I (Unabridged‪)‬

On the wall before him, in the dimness of the room, a great circular screen glowed opaquely, awaiting his touch: a doorway into time and space, a doorway to beauty and deadly peril and everything that made livable for him a life that had, perhaps, gone on too long. The shadows leaped backward into three-dimensional vividness that wavered for a moment and then sharpened into focus upon a desert landscape under a vivid crimson sky. The figures were of a shape he had not seen before and of proportions grotesquely different from his. He wondered if the creatures were intelligent enough to defend themselves. He put one hand on each side of the screen and leaned forward into it....
Another powerful, haunting fantasy from the grandmaster of the genre!