"For years astronomers have been searching for a planet beyond Neptune's orbit. They keep finding clues, but the decisive evidence of an actual sighting eludes them. The four astronauts on board the Ganymede Explorer aren't interested in scientific renown. They just need a safe place to hide out, as far as possible from any kind of civilization. But it seems apt that they of all people wind up being the ones to track down a previously unknown planet. They land full of enthusiasm and curiosity - it doesn't occur to them to be afraid. But they don't know what they've found. Amphitrite is no ordinary celestial body. It's the black planet."--Page [4] of cover.