Gentleman Jole and the Red Queen is in Bujold's Vorkosigan setting. The Vorkosigan books are mostly action-adventure sf, but some of the books don't fit in the "action" category. A Civil Campaign, for example, is a romantic comedy bordering on farce. This newest novel is mainly a romance, but it's much less drama-filled than the typical romance. The central protagonists are solidly middle-aged and, more importantly, mature. The reader never seriously fears that they will make stupid choices based on flawed analysis. They are afflicted with some doubts and indecision, but they doubt sensible things and dither over reasonable options. Even when the outcome was uncertain, I never thought, "oh, this is going to end in disaster if they make the wrong choice." They're smart people. There are good reasons for both paths. They'd be okay.
I really enjoyed reading this novel, especially now, when I'm in the middle of writing The Sun Etherium. TSE's main romance also proceeds fairly smoothly, and the main challenges the characters face aren't life-or-death either. So it was nice to see Bujold making it work. GJ&TRQ isn't her strongest work, certainly, but it's solid and fun and I loved seeing a middle-aged couple get to be the romantic leads.*
There were some elements that didn't work as well for me. It felt like Bujold was ret-conning in Jole's importance in the lives of Cordelia and Aral Vorkosigan over the last 14 or so books. I don't remember Jole being mentioned before, actually, and am kind of wondering if he was (as an extremely minor character). On the one hand, the last 14 books were about Miles and I can quite easily see him being completely oblivious to his parents' private lives. On the other, it did not really feel like Bujold had always intended Jole to have been part of their lives. I'm happy enough to have him in the backstory, I'd just be happier if there'd been prior hints about his presence there.
Anyway, this is a solid 8 and I am happy to keep recommending and reading Bujold's work.
* I tried doing this in The Moon Etherium -- the protagonists are both over 50 -- but since the characters in TME are unaging, they don't come across as middle-aged as strongly.