Another really good Frost novella set in the Night Huntress world. I first read this in Four Dukes and a Devil when I was still new to the Night Huntress world (I think I had just finished the first book, maybe the second). Now you can get it as a standalone eBook. 
 Cat & Bones are barely in this one, but Mencheres plays a big role. The 2 main characters though, the demon-possessed Blake and isolated Elise were fantastic. I really liked this story. Very romantic.