Book 3

The crew of the Starfleet scout ship Sagittarius follows peculiar sensor readings to an alien world, where the natives' efforts to harness a dangerous and unstable technology have thrown the laws of probability out of balance. As disasters and miracles multiply at an ever-increasing rate, it's up to Captain Clark Terrell and his crew to shut down the experiment gone wrong before it's too late-but the odds against them might already be too great to overcome.

Legacies #2: Best Defense

by David Mack

Published 26 July 2016
Just in time for the milestone 50th Anniversary of Star Trek: The Original Series, an epic new trilogy that stretches from the earliest voyages of the Starship Enterprise to Captain Kirk’s historic five-year-mission—and from one universe to another!
    A debt of honor: One brave woman ventures alone into a parallel universe to save her old shipmates, exiled there decades earlier by a mysterious device called the Transfer Key. She soon learns the alternate universe harbors not just an alien invasion force, but a secret that underpins its very existence.
    A mission of peace: A long-awaited Klingon-Federation peace conference convenes, led by Ambassador Sarek of Vulcan and Councillor Gorkon of Qo’noS. But both sides have enemies who would prefer the two great powers remain at war—and who will do anything to make certain hate wins the day.
    An errand of justice: Captain Kirk and his crew seek the stolen Transfer Key that opens a door between universes, but their hunt is cut short by Ambassador Sarek’s plea for help. The Enterprise crew soon becomes targets in a deadly crossfire—one whose outcome will decide the fate of two universes.

™, ®, & © 2016 CBS Studios, Inc. STAR TREK and related marks and logos are trademarks of CBS Studios, Inc. All Rights Reserved.

One man can shape the future...but at what cost?
"In every revolution, there is one man with a vision."

Captain James T. Kirk of the United Federation of Planets spoke those prophetic words to Commander Spock of the Terran Empire, hoping to inspire change. He could not have imagined the impact his counsel would have.

Armed with a secret weapon of terrifying power and a vision of the alternate universe's noble Federation, Spock seizes control of the Terran Empire and commits it to the greatest gamble in its history: democratic reform.

Rivals within the empire try to stop him; enemies outside unite to destroy it.

Only a few people suspect the shocking truth: Spock is knowingly arranging his empire's downfall. But why? Have the burdens of imperial rule driven him mad? Or is this the coldly logical scheme of a man who realizes that freedom must always be paid for in blood?

Spock alone knows that the fall of the empire will be the catalyst for a political chain reaction -- one that will alter the fate of his universe forever.

Vanguard: Storming Heaven

by David Mack

Published 27 March 2012
The final novel in the acclaimed Vanguard saga, based on Star Trek: The Original Series!

Secret operations, sealed orders, high-risk military special operations—such dangerous missions have been at the core of the Star Trek Vanguard series since its inception. Four great nations—the Federation, the Klingon Empire, the Tholian Assembly, and the Romulan Star Empire—have all taken tremendous risks in their race to learn and control the technologies of the ancient interstellar hegemons known as the Shedai. Now get ready for the mystery of the Taurus Reach to be revealed….

Vanguard: Precipice

by David Mack

Published 24 November 2009
Operation Vanguard is in chaos in this novel from the acclaimed Vanguard saga, based on Star Trek: The Original Series!

On a post-apocalyptic world in the Taurus Reach, undercover Starfleet Intelligence agent Cervantes Quinn finds an ancient Shedai conduit. Unfortunately, the Klingons have found it first and sent an army to claim it.

Light-years away on Vulcan, reporter Tim Pennington answers a cryptic call for help and ends up stalking interstellar criminals with an unlikely partner: T'Prynn, the woman who sabotaged his career and is now a fugitive from justice.

Meanwhile, Diego Reyes, former commander of Starbase 47, lives as a prisoner aboard a Klingon starship. But his former enemies aren't seeking revenge. In fact, the only man who knows why Reyes is still alive is the one who arranged his kidnapping and faked his death—the enigmatic Councilor Gorkon.

All their fates, as well as the futures of three great powers, are linked by one thing: the mysterious Mirdonyae Artifact. And unless Doctor Carol Marcus and Ming Xiong can unlock its secrets in time, it might destroy them all.

The mystery of the Taurus Reach is about to be revealed in this third novel from the acclaimed Vanguard saga, based on Star Trek: The Original Series!

Ancient secrets lie on the fourth planet of the Jinoteur system, and three great rivals are fighting to control it. The Federation and the Klingon Empire want to wield its power; the Tholian Assembly wants to bury it.

But the threat stirring on that distant world is more dangerous than they realize. The Shedai, who ruled the Taurus Reach aeons ago, have risen from their ages of deathlike slumber to gather, marshal their strength, and take their revenge.

To keep Jinoteur from falling into enemy hands, the crews of Starbase Vanguard and the U.S.S. Sagittarius must risk everything: friends...loved ones...their own lives. But the sacrifices they make may prove too terrible for them to bear.

A new mission: The late twenty-third century-Starfleet's golden age of exploration. Desperate to stay one step ahead of its rivals, the Federation sends two starships, the scout Sagittarius and the cruiser Endeavour, to plumb the secrets of the vast region known as the Taurus Reach.
A doomed race: Drawn by mysterious energy readings to a lush green world, the crew of the Sagittarius find the Tomol: a species whose members all commit ritual suicide just as they reach the cusp of adulthood.
An old foe: The crew of the Sagittarius wants to save the Tomol from their cycle of self-destruction, but first they'll need to save themselves-from the most nefarious Klingon starship commander in history.