Star Trek: The Next Generation: Dominion War: Book 3: Tunnel Through The Stars
Book 3 of 4, which is actually book 2 in a story of how a couple members of the TNG crew saved the alpha quadrant from an artificial worm hole from being opened up by the Dominion, a story concept that didn’t actually work for me too well, it just opens up too many potential issues with future use of the knowledge and technology in the wider Trek universe that would have way too many problematic implications. The story itself is well written, but I’m not particularly happy that they took the Enterprise out of the story in the first book, then never really brought her back in until the final pages of the story.