The Last Season, by Eric Blehm

This is a who done it kind of mystery, only it's not fictional. It is the true story of Randy Morgenson, an incredibly aware, intelligent, solitary backcountry ranger who spent 28 seasons in Sequoia, Kings Canyon National Park patrolling the wilderness. Randy spent more time wandering the Sierras than did John Muir. Blehm's writing is quite captivating as is the storyline. It's an amazing adventure that had me hooked from the first few pages. One day Morgenson goes missing and the storyline follows one of the largest Search and Rescue missions where many suspected either suicide or foul play. The writing weaves in and out of the search and rescue along with the biography of Randy Morgenson that takes readers far into the world of backcountry rangers and the high Sierras. I wasn't sure who done it until it is revealed at the very end of the book. A fascinating read which was quite difficult to put down.