C.J. Box has written a stand-alone book, Back of Beyond. It features a cop who goes rogue, Cody Hoyt. That action takes place in Yellowstone Park, which seems to be a favored setting for Box. He briefly reinforces the worry about the level of thermal activity that takes place in the park and how much of the continent will be destroyed whenever it blows. (It is 62,000 years overdue!) Anyway, a murder occurs, and Hoyt undertakes to solve it, after getting himself suspended from the sheriff's department in his county. The action moves to Yellowstone where a group of well-heeled clients are going on a wilderness expedition. Cody's son, Justin, is among the group, and Cody is sure that the murderer is there, too. The group has a head start, and Cody must catch up. This book is a little rougher than the normal Box book with lots of dead bodies and great use of the f work in the first half of the book. It's a good read that makes the time pass very quickly, always a good indicator in my book. So, if killing and foul language do not bother you, read it and enjoy.