The River of No Return is about people who travel forward in time at a moment of great stress and what happens to them afterwards. Which doesn't tell you a lot, but there is also a cheese inspector (how many books have those?) and some sideways interrogations of Regency romances in general and the woman-trapped-in-house-with-evil-guardia
The big thing is that so far, the book keeps surprising me. Over and over. A few times it did not, but for the most part, it is not following the paths I had expected, and it is not-following them in an interesting way. Which is a recommendation in itself.