Ragnarok (Star Trek: Voyager)

Ragnarok is the third book in the main Star Trek Voyager series.
==Book Description==
Hope flares for Captain Kathryn Janeway and the crew of the U.S.S. Voyager when their sensors detect a signal that could lead them back home. But as the "Starship Voyager races to the source of the signal, the crew find themselves in the middle of a raging battle between two warring races, a battle that has lasted for hundreds, if not thousands, of years. To journey homewards Captain Janeway and her crew must make their way through the most violent space-born conflict ever known, with both sides determined to destroy them.
(Description from Amazon.com)