In a society revolutionised by a device that lets you walk through a door and be anywhere in the world - instantly...At a time when unauthorised travel has caused millions to die violent deaths...In a world where invasion of privacy is the ultimate crime...He is 'The Visitor'

    Against this backdrop stands Mallory Ringer, who penetrates the Solid State Entity. There he makes a discovery. One that could unlock the secret of immortality.

    Only a few scientists even suspected its presence, and then, suddenly and silently, it arrived, dwarfing and threatening the Moon and wreaking havoc on Earth's tides and weather. Though the Wanderer is stopping in the solar system only to refuel, its mere presence is catastrophic. A tense, thrilling, and towering achievement. Winner of the Hugo Award for Best SF Novel of the Year!