So, The Lotus Flower, The Never-Ending Sacrifice, The Crimson Shadow and Enigma Tales all cover the rebuilding of Cardassia following the Dominion War.
I read The Lotus Flower years ago and remember enjoying it, with its focus on the O'Briens' life on Cardassia and a tense political situation in a not yet stable nation. The only caveat would be that, in English, it only comes bundled with the Andor entry in the Worlds of DS9 series, so if you don't want to also read that (personally I didn't really enjoy it) it might financially make more sense to buy any of the other novels.
The Never-Ending Sacrifice is truly amazing. It's a great character study of Rugal and 2370s Cardassian society as a whole. It also gives you a bit of a look behind the curtain of what was going on on Cardassia during DS9, tying in with important events such as the various regime changes. I actually read this after the other books mentioned above and I think that works just as well.
The Crimson Shadow has a focus on Captain Picard, but there's still a major Cardassian element and explores the pushbacks of the more regressive groups of Cardassians against Federation aid. This book is also the second book the Star Trek: The Fall mini-series, but I think you can safely read this without being majorly confused about the what's going on. It overlaps with the first book, so this is really the start of the story from the perspective of the characters here. I'd definitely recommend this one.
I recently Enigma Tales, just before The Never-Ending Sacrifice, and it's quite good! Enigma tales, within Cardassian society are considered "low-brow" mystery stories, with that twist that everyone is actually guilty and the state is great (pre-war Cardassia, am i right?) and this novel is somewhat of a twist on that concept. Two caveats continuity-wise: Some elements of this novel spin out of the Section 31 novel Control and may be a bit surprising. The novel also features Kathryn Pulaski and Peter Alden, who have appeared in other McCormack stories, previously. Which brings me to...
Brinkmanship and The Missing. Brinkmanship introduces Starfleet Intelligence guy Peter Alden and is a very interesting look at the structure and workings of Tzenkethi society, so if you're at all curious about that species, Brinkmanship is the novel for you. It's been a looong while since I read it, but I do remember it fondly. It also has Captain Ezri Dax in it, so that's cool too, right?
The Missing is a tad bit weird, in that it's a DS9 novel starring Kathryn Pulaski and Beverly Crusher, as well as having Captain Picard log entries at the start of every chapter. Honestly, I don't remember much about this one, but if you like Pulaski, or are open to liking a version of her that's two decades removed from her TV self you might enjoy this novel. I'd still recommend Enigma Tales over it any day.
I'll also second The Way to the Stars as a great coming of age story.
