The Shape Shifter is the 18th and last title in the Joe Leaphorn and Jim Chee series written by Tony Hillerman, although the series has been continued by his daughter, Anne. It has dropped to $0.99 at Nook US as their daily deal. As of now, it has not dropped at either Kindle or Kobo US. If you, like me, don't like the hassle of dealing with non-officially-downloadable Nook books, you can price-match to Kobo.
(Although I'm amazed to find myself writing something nice about Kobo, I price-matched another title at Kobo a week or two ago, and it is still going smoothly for me - I price-match a couple of times a month, and have only had trouble once, and that was quickly resolved with a screenshot of the sale price at the other seller.)
I have a sneaking fondness for this title since it is the first ebook I ever read, in MS .lit format, on my PDA, on a long late-night Newark-LA flight, coming home from a long miserable business trip, and I remember thinking ebooks were going to be a cool thing!
link:
https://www.barnesandnoble.com/w/sha...780061801969#/