Captain Kirk and his crew seek the stolen Transfer Key that opens a door to a parallel universe, but their hunt is cut short by Ambassador Sarek's plea for help from the long-awaited Klingon-Federation peace conference. The Enterprise crew soon become targets in a deadly crossfire, one whose outcome will decide the fate of two universes.

Time in the galaxy has stopped running in its normal course. That can mean only one thing -- the Guardian of Forever is malfunctioning. To save the universe, Starfleet Command reunites three of its most legendary figures -- Admiral James T. Kirk, Spock of Vulcan, and Dr. Leonard McCoy -- and sends them on a desperate mission to contact the Guardian, a journey that ultimately takes them 5,000 years into the past. They must find Spock's son Zar once...

Celebrating the 50th anniversary of Star Trek, a novel of The Original Series starring the crew of the USS Enterprise finds Captain Kirk and Commander Spock trying to convince the First Federation leaders to overcome their fears to stave off a catastrophe.

Long before the Federation, powerful force invaded our galaxy and almost destroyed it... a force that began with possession and madness, and ended in murder! A Starfleet research expedition to the farthest reaches of the galaxy has unearthed that force once again... and brought its silent evil back to the planet Vulcan. Now Spock must defeat the demons that threaten his friends and family,or the Enterprise™ will become the instrument of the galaxy's...

"An all-new Star Trek novel--continuing the legacy of the critically acclaimed Vanguardseries! Captain James T. Kirk and the crew of the Starship Enterprise go in search of a missing Federation scientist--only to become trapped between a Klingon warship and Starfleet's mysterious Operation: Vanguard."

An epic new Star Trek saga by New York Times bestselling author Greg Cox set during the original five-year mission! The planet Vok is holding its first free elections after years of oppressive military rule. Captain James T. Kirk and the crew of the Starship Enterprise have been dispatched by Starfleet to serve as impartial observers, but remaining neutral proves a challenge, as Kirk confronts a tangled web of scandal, conspiracy, and assassination...

Captain Kirk is assigned to investigate when peace breaks out between two planets that have been at war for over 12,000 years, and he is very suspicious when he learns that the architect of the peace treaty is a notorious con artist.

Rules of Engagement A sudden revolution on the planet Dekkanar brings Captain Kirk and the U.S.S. Enterprise™ running to evacate Federation personnel trapped there. But their orders from Starfleet are quite clear; the U.S.S. Enterprise is to assist in the evacuation, no more. No weapons are to be displayed, no shields raised, no shots fired. Meanwhile, halfway across the galaxy, an experimental Klingon warship sets forth on a mission of its own,...

Faces Of Fire En route to Alpha Malurian Six to settle a dispute between two religions, the U.S.S. Enterprise™ first stops to do a routine check on the progress of a terraforming colony on Beta Canzandia Three - a colony whose inhabitants include Carol and David Marcus. While Spock is left behind at the terraforming colony to continue his scientific studies, the rest of the crew heads to Alpha Malurian Six to find the dispute has turned to war. As...

Elcidar Beta Three -- a tranquil, undisturbed planet strategically located between the Federation and the Klingon Empire. Home to the Midgwins, a race of people who throughout all time have lived in peace with their planet, and themselves. But now, times are changing. Unwilling to embrace any form of technology, the Midgwins have exhausted their world's natural resources, and stand on the brink of global famine. When Captain Kirk and the Enterprise...