This book is a delight. It's full of adventure, romance, and humor, most particularly in the form of a pet stoat. Sally has grown up to be a formidable heroine, brave but not foolishly so. She comes across as a sort of successor to Miss Gwen for the next generation. And Lucien, although his baggage sometimes temporarily gets the best of him, displays remarkable endurance. They make a perfect couple.
The only slight disappointment from this book is one that I have trouble describing because it would be incredibly spoilery. The best I can do is: although for most of the book, the characters believe that the murders are connected to the ongoing plot of the series, it turns out they have nothing to do with it. Change the names and have the characters not have a theory about who is behind the murders (just a need to investigate) and this could have been any stand alone romance. It was a fun one, but it was missing a crucial element of the series, as far as I'm concerned.
Overall Rating: B+
Theoretically The Mark of the Midnight Manzanilla is released tomorrow, but since I didn't have an ARC, just a copy that shipped early from B&N, I wouldn't be surprised if you could find it already, too.