Leonard Sale survives a catastrophic crash on what seems at first like a welcoming planetoid, expecting rescue to be only six days away. Instead, the planet begins to invade his mind with eerie voices, seductive sleep, and the sense of an ancient presence reaching for him, turning relief into dread. To stay sane, Sale imposes a rigid routine of walking, eating, reading, and refusing to sleep, but the real battle is inside his own consciousness. His fear proves justified when he learns that the voices belong to Iorr and Tylle, two long-dead intelligences from a vanished civilization, locked in an endless war after surviving as disembodied minds. They need Sale's body, senses, and sleeping mind to regain substance, and they begin using him as the battlefield for their ancient conflict. What follows is a stark science-fiction nightmare of psychic possession, isolation, and survival, as Sale struggles to preserve his identity while trapped between powers far older and more dangerous than the hostile world around him. This edition has been fully restored with modern typesetting, custom cover design.