The Disappeared: Joe Pickett, Book 18 by C. J. Box (Paperback)
At the same time, his friend Nate Romanowski has asked Joe to intervene with the feds on behalf of falconers who can no longer hunt with eagles even though their permits are in order. Who is blocking the falconers and why? The more he investigates both cases, the more someone wants him to go away. Is it because of the missing woman or because he's become Nate's advocate? Or are they somehow connected? The answers, when they come, will be even worse than he'd imagined.