Another fine outing for C. J. Box, with the latest exploits of Wyoming game warden Joe Pickett. Who goes through an unusual amount of hell here.
As the book opens, Joe is investigating the remains of Lek 64, a sage grouse colony that's been shotgun-slaughtered by persons unknown. A major distraction intervenes: Joe's wayward daughter April has been discovered nearly beaten to death on the side of a road.
Suspicion naturally falls on the rodeo cowboy with whom April had run off in the previous book. But (hm) an anonymous tip is called in, pointing the finger at a reclusive, heavily armed nutjob who doesn't recognize government authority, etc.
In the meantime, Joe's friend Nate Romanowski is in the hands of Federal law enforcement, and they have the bright idea to release him and use him as bait to entrap the at-large bad guy Nate betrayed in the previous book of the series. But Nate's only out for a brief time until he runs into big trouble.
Confession: I thought I saw the big plot twist well in advance. I was wrong. Author Box had me fooled.