Book #25 in the Star Trek Deep Space Nine series of books from Pocket Books and #2 of 3 in the Rebels miniseries.
"Kai Winn, the supreme spiritual leader of the Bajoran people, has never divulged what she personally did during the harsh and perilous days of the Occupation. But now, as alien warships fight to reclaim Deep Space Nine, she cannot help recalling those bygone days -- and her own private war against the alien oppressors. Meanwhile, on the other side of the wormhole, Captain Sisko and the crew of the Defiant are stranded on an alien world overrun by ruthless invaders...."
Note: Elim Garak plays a very minor role.