I've just finished this, and found it to be a very entertaining and typical Quark/Ferengi tale, and certainly-IMO-better than Lust's Latinum Lost (and Found).
Quark's interaction with Odo and Brunt were fun, and really evoked the feel of the show. It was good to see Bena, rather than just get a quick reference to her. And Morn has an important role!
- Rules of Accusation takes place over a few days just after The Missing and before Sacraments of Fire. It doesn't really have anything to do with, or have any affect upon the other novels, but there are a few nods to what's going on with other characters: At this point, Nog's not around, Sisko is about to depart DS9 on a priority mission, and Odo's waiting to be granted permission to visit the Newton Outpost.I just wish I had a clearer idea of how all the various DS9 stories fitted in with each other.