Star Trek: The Brave and the Bold, book 2
Keith R. A. DeCandido2003

Two of the Malkus Artifacts – used as deadly weapons millennia ago – have been uncovered since their discovery in the 22nd century. Now in the 24th century, two more artifacts lie in wait, ready to wreak havoc on an unsuspecting galaxy...

While on their shakedown cruise, Captain Kathryn Janeway and the Starship USS Voyager discover the third artifact in the Demilitarized Zone – in the hands of the Maquis! With the aid of Captain Robert DeSoto of the USS Hood, Voyager security chief Lieutenant Tuvok infiltrates the Maquis, and must gain the trust of cell leaders Chakotay and Cal Hudson before the terrorists use the artifact to throw the DMZ into chaos!

When the final artifact is unearthed on Narendra III, it leads to several mysterious disappearances throughout Federation and Klingon space – including Federation Ambassadors Spock and Worf. Captain Jean-Luc Picard of the Starship Enterprise joins forces with Captain Klag of the I.K.S. Gorkon – but even the greatest vessels of two nations may not be enough when the deadly secret of the final artifact is revealed!