If you're familiar enough with DS9 so that you don't need to rack your brain when previously established characters and events occur, then I would recommend to you Una McCormack's The Never Ending Sacrifice
Ms. McCormack is not a famous established writer, at least not on the order of those who you have mentioned above, and in fact has spent most of her life writing fan-fiction but thank God I didn't know this when I thought about purchasing that novel.
I'll quote myself from three years ago:
Seven of eleven wrote:
I haven't come to this site in nearly a year and I haven't talked about anything Trek related on here for several more but I absolutely had to log back in to say what an absolutely terrific novel this is.
I started reading it late last night right before bed, planning to stop once I got sleepy. I stopped at four in the morning because that was when I had finished the book.
I have probably read close to a hundred Trek novels and every time I pick one up, my expectations are that it will be an enjoyable and entertaining diversion for the duration of the time that I read it; I do not expect an engrossing novel which makes me emotionally invested in their lives of complex and flawed characters, which makes me think of the contradictory and reciprocal qualities and frailties found within an individual and within society, which makes me view such timeworn topoi such as love and duty in a different light. And yet this is such a book.
If you're looking for a novel that simply advanced the main DS9 story arc or is about managing to reverse the polarity of the neutron flow within the flux capacitor to close the subspace anomaly, you will be disappointed. But if you're looking for a profound and well-written bildungsroman that shows the zeniths and nadirs of human (or Cardassian or Bajoran) nature, Trek related or not, science-fiction or not, I heartily recommend this one and send my thanks to the author for having written it.