In their relentless quest for technological perfection, they have destroyed entire star systems, enslaved countless people, and, in a single brutal attack, decimated Starfleet's mightiest vessels. Answering a distress call from a planet under attack by the Borg, the U.S.S. Enterprise meets Delcara, the lone survivor of an alien race the Borg obliterated. Blinded by hatred, Delcara seeks the ultimate revenge, the complete destruction of her race's executioners. But the U.S.S. Enterprise crew learns that Delcara's vengeance carries a terrible price, for once unleashed, the destructive force she commands will annihilate not only the Borg, but countless innocents as well.

    In that split second, defined paradoxically by both salvation and loss, they will destroy the world and then restore it. Much had come before, and much would come after, but nothing would color their lives more than that one, isolated instant on the edge of forever.IN A SINGLE MOMENT…Leonard McCoy, displaced in time, saves a woman from dying in a traffic accident, and in so doing alters Earth's history. Stranded in the past, he struggles to find a way back to his own century. But living an existence he was not meant to, he will eventually have to move on, and ultimately face the shadows born of his lost life.IN A SINGLE MOMENT…Leonard McCoy, displaced in time, is prevented from saving a woman from dying in a traffic accident, allowing Earth's history to remain unchanged. Returning to the present, he encounters a medical mystery he is committed to solving. But the echoes of an existence he never lived haunt him, and the specter of a premature death will bring him full circle to the shadows he has never faced.

    His holographic excursions into 1940s San Francisco, a colorful world of gunplay and gangsters, provide a welcome diversion from his hefty responsibilities as a Starfleet captain.But not this time.The starship Enterprise has lost power and control, its own momentum carrying it ever deeper into a dangerous zone of warped space and time. And the only way out is hidden somewhere in the mean streets and back alleys of old Frisco. But so is a cold-blooded murderer…Now Dixon Hill, alias Jean-Luc Picard, must get to the bottom of a tangled mystery that threatens the lives of everyone aboard the Enterprise!

    Kirk and Dr. McCoy must stretch themselves to the limit as assassination attempts threaten the war-ravaged world of Nador's fragile hope of peace. The starship Enterprise is assigned to attend the ceremony that will unite a world. The focus of the ceremony is a pair of Siamese Twins named Abon and Delor who represent the united factions of the planet Nador. Disaster strikes when assassination attempts are made against the twins, who embody the hopes and dreams of the formerly war-torn planet's entire population. Captain James T. Kirk must root out the assassins from whatever hiding places they are striking from - whether they be hidden in deep places or even in plain sight. Meanwhile, Dr. McCoy must perform a radical surgical procedure in a desperate attempt to save Abon and Delor's lives.

    Enterprise-D's ongoing mission when a virulent epidemic strikes the populace of Archaria III, endangering the lives of thousands and provoking acts of mob violence against those believed responsible for the spread of the disease. While Data and Natasha Yar team up to uncover the true origins of the virus, Dr. Crusher finds the implacable sickness resists all her efforts to find a cure. The desperate quest for a cure becomes even more urgent when Deanna Troi succumbs to the dreaded plague...again and again.

    Patrolling the Cardassian border and bracing for an imminent joint Dominion-Cardassian offensive, Captain Jean-Luc Picard and the crew of the Enterprise are reunited with Ro Laren.

    Kirk on the U.S.S. Enterpris NCC-1701-B, Montgomery Scott decides to leave Starfleet. A chance encounter with a mysterious woman named Guinan leads him to hitch a ride on the U.S.S. Jenolen -- which crashes into a Dyson Sphere, leaving only Scotty to survive suspended as a transporter pattern....Seventy-five years later, he is revived aboard the Enterprise-D -- on which Guinan serves as bartender. But fate has not finished with either Scotty or Guinan. The engineer hatches an audacious plan to travel back in time and rescue Jim Kirk the moment before he would vanish into the nexus and bring him back to the twenty-fourth century without damaging the timeline.Scotty's plan, however, does not go as expected. Though Kirk is rescued, the famed captain and the engineer, as well as Captain Picard, Guinan, and the crew of the Enterprise-D, are trapped in an altered past where there is no Federation, and no human race. Sarek of Vulcan leads a ragtag collection of species fighting a losing battle against the Borg, who have swarmed into the Alpha Quadrant and assimilated Earth.Starfleet's finest miracle worker must find a way to restore the timeline before the galaxy is overrun....

    But Kirk, McCoy, Scotty and the crew join forces again on the Enterprise to thwart an incredibly destructive power—a threat to earth and the human race. This novel is written by the creator of Star Trek, Gene Roddenberry.