A few years after the disappearance of the mysterious Builder Artifacts salted throughout the inhabited regions of the universe, a new phenomenon appears in the unexplored Sagittarian Arm of the galaxy, a force with the power to destroy planets. Capt. Hans Rebka and his team of galactic troubleshooters travel to the threatened Marglot system only to find themselves directly in the path of destruction.

The sky is falling — again. Following up on 1998’s excellent Aftermath, Starfire subjects planet Earth to yet another cosmic blast from the Alpha Centauri supernova. But while the blast that hit Earth in Aftermath simply cooked the Southern hemisphere and knocked out unshielded technology with a flash of gamma rays, this wave promises to do some real damage, with a sleet of trillion-nuclei bundles moving at one-tenth the speed of light.Warned by the first catastrophe, Earth began building an electromagnetic shield out of the orbiting SkyCity station to divert the incoming apocalypse. But not only will the storm come earlier than expected, the carnage may be worse than anyone imagined — preliminary data shows that the supernova was no accident, and that the wave of particles may in fact be a beam. Crackerjack hard-SF author Charles Sheffield brings back much of the cast of Aftermath for this suspenseful, well-paced follow-up, the two most satisfying returnees being sociopath-savant Oliver Guest and his former patient Seth Parsigian. In the book’s subplot, the brilliant Guest and gruff Parsigian must team up to solve a string of grisly child murders on Sky City that threatens to push the shield project even further behind schedule.

It was just before Summertide, the time when the twin planets, Opal and Quake, would orbit closest to their sun, subjecting both — but Quake in particular — to vast tidal forces. And it was to be the most violent Summertide ever, due to the Grand Conjunction of the system’s stars and planets, something that happened only every 350,000 years.Access to the unstable Quake was supposed to be prohibited, but some very insistent travelers were determined to make the trip. Professor Darya Lang, who had made a career studying artifacts left by the long-vanished aliens called the Builders, had a hunch that during this unusal Summertide she might find the Builders themselves. Louis Nenda and the Cecropian Atvar H’sial had their own interests in Quake, and would do anything to get there. And Councilor Julius Graves was hunting murderers — if they were hiding on Quake, he needed no one’s permission to search for them.Planetary Administrators Hans Rebka and Max Perry had no choice but to go to Quake themselves — risking their lives to protect the others — and to learn, just maybe, the secret of Summertide and the Builders…

18th Century Europe: It is an age when superstition is beginning to give way to the force of human reason, and no man so fully embodies the spirit of the times as Dr. Erasmus Darwin. Thinker, healer, and explorer of the bizarre and the seemingly supernatural, no mystery can stand for long against Darwin’s enlightened analysis. And there are far more mysteries than history knows…For Erasmus Darwin’s world is filled with oddities that most cannot believe: from unknown beings lurking just outside the boundaries of civilization, to anomalies that even the greatest natural philosophers will be hard-pressed to explain, to mysterious deaths that give rise to fears of malevolent sorcery.And when the renowned Dr. Darwin is called upon to heal a man dying of an ailment that seems impossible, he has no idea that it is the beginning of a quest that will lead him to the darkest corners of Europe, and a stunning encounter with the most famous inhabitant of a certain Scottish loch…

An anthology of stories edited by Esther M. Freisner and Martin Harry GreenbergIn a collection of fantasy stories, warrior women take on pirates invading a charity ball, bring an obnoxious loremaster to justice, protect children from magically-summoned barbarian hordes, and rescue Tokyo from destructive reptiles.

Presenting the space adventures of Arthur Morton McAndrew, space-time expert and scientist extraordinaire, and his long-suffering companion, spaceship skipper Jeanie Roker. Jeanie first met McAndrew on a routine run to Titan and quickly learned he was a genius of the caliber of Newton or Einstein. When McAndrew invented a space drive that let frail humans survive hundreds of gravities of acceleration, he disappeared while testing it, and Jeanie had to find him, using a trail of cryptic messages he had left behind. That was the beginning of a beautiful friendship, in spite of the gray hairs that Jeanie began accumulating as a result of McAndrew’s impractical nature and his talent for getting himself into trouble with much more practical villains, such as…

In the 23rd century, out of all the races of the galaxy, only humanity has discovered the secret of travel between the stars. When a threat to all life arises from non-living cyborgs, suddenly the peculiar human virtues of valor and stubbornness make the despised Earthlings the saviors of all.

Banned from interstellar travel for their aggressiveness, humans have one last chance to regain the stars, provided they can solve the mystery of the disappearance of a pair of alien ships lost somewhere in the unknown part of space known as the Geyser Swirl. This sequel to The Mind Pool continues Sheffield’s far future history of humanity’s attempts to explore the universe. His skill at blending hard science with fast-paced plotting and colorful characters makes this a first-rate SF adventure that belongs in most libraries.

Rob Merlin was the best engineer who had ever lived. That was why "The King of Space" had to have him for the most spectacular construction project ever — even though Rob was a potentially fatal threat to his power…Thus begins a breakthrough novel by the former President of the American Astronautical Society, about an idea whose time has come: a shimmering bridge between Earth and space that mankind will climb to the stars!Sound like fantasy? The concept has been in the literature of physics for over three decades, but only a writer with the scientific background of a Sheffield or a Clarke could bring the idea to life.

In The Billion Dollar Boy, rich, spoiled, overweight 15-year-old Shelby Cheever is bored, so he convinces his mother to take him on a space cruise. Without proper preparation, and drunk besides, he accesses the node network alone to visit the Kuiper asteroid belt and finds himself hurtled 27 light years out to the Messina Dust Cloud, where he is rescued by a mining family. On the three-month journey home, Shelby must learn how to do for himself in an environment where his wealth and pampered status mean nothing. Another well-written coming-of-age adventure story in the new Jupiter series. For large sf collections. In the hard-science Tomorrow & Tomorrow, Sheffield explores changes in the solar system and the theory of a closed vs. open system wrapped around a tale of a musician’s fanatical love for his wife. Drake Merlin has his dying wife Ana and himself cryonically frozen so they can be together once a cure for her disease is found. Several times over 15 billion years he is awakened only to find no cure and, one time, he accidentally causes Ana’s death. But if the theory of a closed system is true and the universe shrinks, he and Ana can return to a point when she is alive.

The search for the legendary Builders results in the reemergence of an ancient race of galactic marauders who must be stopped before they reconquer the world in this sequel to Summertide and Divergence.