Cloak and Dagger
Dark Matters, Book 1: Cloak and Dagger.
Allying with a mysterious and powerful alien species, the Romulan Empire from 20 years in the past has created a new wormhole – one leading straight to the present-day Delta Quadrant and the U.S.S. Voyager. There a sinister plan is set in motion, as the Romulans wish to gain a head start on future Federation technology by capturing Voyager and manipulating the phenomenon known as "dark matter"... with potentially disastrous consequences for the entire cosmos.
Series contains 21 primary works and has 21 total works. Current series reading order on below.
Main series Star Trek: Voyager