Incident at Arbuk by John Betancourt is Book #5 from the Star Trek: Voyager book series. The Voyager crew encounters a distress signal while attempting to make their way home from the Delta Quadrant. While investigating the poorly populated Arbuk system, they find the shuttle and the alien that sent the communication, as well as an impressively powerful Doomsday weapon, and the civilization eradicated by the device.
While B'Elanna Torres, the chief engineer and two of her staff are aboard the weapon, it fires and causes further devastation, forcing the crew to consider destroying the device, when what appear to be warships approach clearly attempting to take control. Captain Janeway and her crew must disable the device, fend off attacking vehicles while Voyager has been hampered by urgent needs for repair, and the barriers of language and culture.
Overall, a good read with plot devices consistent with the TV show, and the Star Trek universe. I did not often love this version of Star Trek, but this literary version is emblematic of the best stories in the tradition.