OUT of RANGE (Joe Pickett #5) by C. J. Box
Originally published in 2005. Wyoming Game Warden Joe Pickett has been re-assigned. Normally, he covers the area around the town of Saddlestring but he has been temporarily re-assigned to a plum location - Jackson, Wyoming - the home of the Grand Tetons and a well-known retreat for the rich and the famous. While Joe is thrilled for the opportunity, he is not happy about the circumstances behind it. A fellow game warden that he knew and respected suffered some sort of mental breakdown and killed himself. Plus, his family has been receiving ominous "breather" phone messages at all times of day and night... So, Joe Pickett goes off to Jackson only to find that this new assignment is extraordinarily complicated by politically-connected power players, trendy protesters and the investigation into the previous game warden's suicide and things are getting weirder and more complicated all of the time... I am reading this series in what seems to be an insane random order.