Dark Matters, Book 2: Ghost Dance.
Janeway and her crew in one universe, and Chakotay and Paris in another, are forced to retrace the epic journey of Voyager across the Delta Quadrant. En route, they encounter old foes and allies, while striving to outrace the cataclysmic doom now overtaking two separate realities.
Star Trek: Voyager (numbered novels) consists of twenty-one books. The current recommended reading order for the series is provided below.
Main series Star Trek: Voyager