Magic Shifts is the 8th (per the blurb, but there are a lot of novellas and stuff, so it really depends on how you count) in the Kate Daniels series by Ilona Andrews. In any case, whatever the number, it has dropped to $1.99 at Kindle and Kobo US. Books in this series don't go on sale all that often, so grab it if you want it. I don't read a whole lot of romance, and even less paranormal romance, but I've enjoyed this series a lot, so happy to see this one on sale.
Kindle US:
https://www.amazon.com/dp/B00OQSF7GY
Kobo US:
https://www.kobo.com/us/en/ebook/magic-shifts