Star Trek: New Frontier, book 15 : After the Fall
Peter David2004

Three years have passed since the events depicted in Stone and Anvil, and for the past and present crew of the USS Excalibur, life has taken many surprising twists and turns. Captain Elizabeth Shelby has been promoted to admiral and is commanding officer of Space Station Bravo – while her former starship, the USS Trident, has a new captain. Soleta has left Starfleet to embrace the perils of exploring her Romulan heritage. The powerful Zak Kebron doubles as Excalibur counselor and security chief.

And Mackenzie Calhoun? Well, Mackenzie Calhoun's still who he is.

As Si Cwan, prime minister of the New Thallonian Protectorate, prepares to marry off his sister Kallinda in a politically advantageous pairing that will strengthen his newly restored empire, the bride-to-be is abducted in a calamitous event that threatens to destabilize the entire sector – especially since Kallinda's abductor is all too familiar.

As the Excalibur-A, the Trident, and the entire Thallonian fleet attempt to bring order to their sector of space, none could ever suspect that a mysterious alien force may also be playing a part in Kallinda's disappearance – and that the the entire galaxy may soon face a long-forgotten enemy.