I'm a college student and am not working right now, so I have plenty of time to rot in front of the TV, lol. I haven't read The Never-Ending Sacrifice but I would like to. Right now I'm reading a new DS9 novel called The Soul Key by Olivia Woods. It takes place in the mirror universe and is confusing. I think maybe I should read some of the books that come before it.
Yeah, that's really not a good jumping on point for the DS9-R novels.
They're actually quite good, but you really want to start with the "season 8" material, beginning with
Avatar books 1 + 2 by S.D. Perry and ending with
Unity by the same author. In between there's a bunch of other stuff, most notably the
Mission Gamma series of four books by other authors.
Otherwise for the specific plotline of
The Soul Key, the prior two books are
Warpath by David Mack and
Fearful Symmetry by Olivia Woods.
Yeah, the DS9-R is mostly really good (or at least the earlier books are)... Trek princess, if you're having problems finding older books, you can get the 2 omnibus editions which are still available on Amazon,
Twist of Faith (the first 5 novels -
Avatar book 1 & 2,
Abyss, Demons of Air and Darkness, and novella
Horn and Ivory) and
These Haunted Seas (the next two novels -
Mission Gamma 1: Twilight and
Mission Gamma 2: This Gray Spirit). The next books are trickier to find as they're out of print -
Mission Gamma 3: Cathedral,
Mission Gamma 4: Lesser Evil,
Rising Son and
Unity. Then after that, the 3 Worlds of Deep Space Nine anthologies (with 2 novellas each),
Warpath and
Fearful Symmetry, and only then
The Soul Key.
But you can read
The Never-Ending Sacrifice any time you want, it's a side story not connected to any of the other books' storylines. I definitely recommend it, it's an excellent novel about Cardassia from season 2 of DS9 to the aftermath of the Dominion war. I also recommend the
Terok Nor trilogy (
Day of the Vipers, Night of the Wolves, Dawn of the Eagles), which is also still in print and not hard to find. It is a great prequel to DS9, about the Occupation of Bajor. The books span some 50 years, from the first contact between Bajor and Cardassia to the end of the Occupation, and there are lots of familiar characters (they assumed Cardassian and Bajoran lifespans to be very long so they could have DS9 characters like Dukat in the story right from the start - I find that rather implausible, but I can get past that since the books are wonderfully written panoramic portrayal of Bajoran and Cardassian cultures, and despite a huge number of characters, they are all, down to the minor ones, given depth and plausible motives and POVs.)
Among the books that aren't in print anymore, there's
Prophecy and Change, an anthology of stories that mostly take place during the show's run and fill some gaps, but the last story is Andrew Robinson's sequel to
A Stitch in Time; and another anthology,
The Lives of Dax. I enjoyed both of them.
Finally, the two-part novel
The Left Hand of Destiny is a sidestory about Klingon Empire with Martok as the main character, but it's not a typical Trek book, and whether you like it or not depends not just on how you feel about Klingons, but whether you would enjoy an epic/mythic story inspired by the King Arthur legend, with a lot of battle, melodrama, blood, monsters and mysticism. For the record, I found it very entertaining.