Speaks the Nightbird (Matthew Corbett #1) by Robert R. McCammon is $1.99 again at most retailers. GR 4.12.
I really enjoyed this one and gave it four stars.
https://play.google.com/store/books/...d=fWzfAAAAQBAJ
https://www.amazon.com/Speaks-Nightb...dp/B00F9H59Z0/