Star Trek: New Frontier, book 02 : Into the Void
Peter David1997

Roll Call: The Crew of the U.S.S. Excalibur:
Captain Mackenzie Calhoun: An unorthodox, decisive young captain who loves his crew and his ship, and loves testing their limits even more.

Commander Shelby: A woman of strong opinions and strong values, Shelby never hesitated to tell her captains when she thought they were wrong, and Mackenzie Calhoun won't be any exception.

Burgoyne 172: The chief engineer of the Excalibur, with the decisiveness of Calhoun, the strength of Shelby, and the gender of both. Burgoyne is a Hermat, and when s/he sets his/her sights on you, s/he isn't an easy...person...to refuse.

As the Thallonian Empire succumbs to violence and insurrection, the U.S.S. Excalibur prepares to launch on her humanitarian mission of mercy. But her departure is destined to be a memorable one, as Calhoun contends with an unexpected stowaway, a stormy relationship with his crew, and -- light-years away -- frightened refugees aboard a dying ship.