A secret agent aboard an intra-galactic "railroad" must derail a sinister scheme to enslave the universe in this nonstop science fiction thriller from Hugo Award–winning author Timothy Zahn The universe is a dangerous place, a fact violently brought home to Frank Compton for perhaps the thousandth time when a stranger delivering a message dies right in front of him. An operative for Western Alliance Intelligence until his whistle-blowing activities...

A century ago, scientists theorized that a habitable planet existed in a nearby solar system. Today, ten astronauts will leave a dying Earth to find it. Four are decorated veterans of the 20th century's space-race. And six are teenagers, graduates of the exclusive Dalton Academy, who've been in training for this mission for most of their lives. It will take the team 23 years to reach Terra-Two. Twenty-three years spent in close quarters. Twenty-three...

2095. After long months of travel, the gigantic colony ship Goddard has at last made orbit around Saturn, carrying a population of more than of 10,000 dissidents, rebels, extremists, and visionaries seeking a new life. Among Goddard's missions is the study of Titan, which offers the tantalizing possibility that life may exist amid its windswept islands and chill black seas. When the exploration vessel Titan Alpha mysteriously fails after reaching...