Earth establishes extrasolar colonies and discovers alien races--including the warlike Fallers, the only spacefaring race besides humans. Mysterious, uncommunicative, and relentlessly bent on humanity's extinction, the Fallers have mastered the star gates, and are closing in on earth. Dr. Bazargan commands the scientific team sent to a newly discovered world to study its humanoid natives: beings who literally perceive only one reality. To lie is to be unreal--and condemned to death. The humans must flee for their lives across the unknown planet when they and the aliens learn the scientific mission is a lie. It's the cover for a secret military exploration of the moon Tas, which is another artifact of the gate-makers: a superweapon capable of annihilating all life in a star system, and already known to the Fallers. Nancy Kress has won the Hugo, the Sturgeon, and three Nebula Awards. She is justly acclaimed as a literary SF writer, but receives little acknowledgement that her work is hard SF. Probability Moon should change this, winning her many new readers while pleasing her fans. It's a rare and desirable hybrid: a literary, military, hard-SF novel. Set in the same world as her Nebula- and Sturgeon-winning novelette, "Flowers of Aulit Prison," Probability Moon is the first book of a trilogy, but it has a self-contained story line. The sequel, Probability Sun, will appear in 2001, and the concluding book will be The Fabric of Space. --Cynthia Ward

    Cavor soon succeeds in his experiments, only to tell a stunned Bedford the invention makes possible one of the oldest dreams of humanity: a journey to the moon. With Bedford motivated by money, and Cavor by the desire for knowledge, the two embark on the expedition. But neither are prepared for what they find - a world of freezing nights, boiling days and sinister alien life, on which they may be trapped forever.

    For the first time in one volume: every word Bruce Sterling has ever written on the Shapers-Mechanists Universe.In the last decade, Sterling has emerged a pioneer of crucial, cutting-edge science fiction. Now Ace Books is proud to offer Sterling's stunning world of the Schismatrix--where Shaper revolutionaries struggle against aristocratic Mechanists for ultimate control of man's destiny. This volume includes the classic full-length novel, Schismatrix, plus thousands of words of mind-bending short fiction.

    Kornbluth --The report on the Barnhouse effect / Kurt Vonnegut, Jr. --The tourist trade / Bob Tucker --Rainmaker / John Reese --Absalom / Henry Kuttner --The monster / Lester del Rey --Jay score / Eric Frank Russell --Betelgeuse Bridge / William Tenn --Survival ship / Judith Merril --Keyhole / Murray Leinster --Misbegotten missionary / Isaac Asimov --The sack / William Morrison --Poor superman / Fritz Leiber

    That single tragedy set off a whole series of events, resulting in the Spanish Armada's defeat of England and subsequent demise of Protestantism. Now it's the 20th century, and the Church of Rome reigns supreme. People live a pastoral existence of guilds and farming, with technology held back to the level of the steam locomotive and primitive radio. Still, science cannot be held back forever...a revolution is building.

    The continuous beats of a pulsar have become odd, irregular…artificial. It can only be a code.Frantically, a research team struggles to decipher the alien communication. And what the scientists discover is destined to shake the foundations of empires around this world—from Wall Street to the Vatican

    They mourn, and Cormac sends a beautifully written eulogy back to Earth. The word from ground control is unequivocal: no matter what happens, the mission must continue.But as the body count begins to rise, Cormac finds himself alone and spiralling towards his own inevitable death … unless he can do something to stop it.