Enjoy the Aventine; don't enjoy Captain Ezri. The very idea that she's a Captain before literally every other character in all of the 24th century just chaps my ass. She was a neurotic waste of time one-season character who stole way too much of DS9's 7th season for herself when the time should have been spent on the crew we'd loved and lost with for the prior 6 years. Jadzia forever, Ezri never! :P
I felt the same way, but she's kind of been growing on me the last few books. Still not sure I'd buy an Aventine novel though. Oh well, that's what public libraries are for. I might try it out there first.