Dead Mountain: The Untold True Story of the Dyatlov Pass Incident:

Dead Mountain: The Untold True Story of the Dyatlov Pass Incident by: Donnie Eichar
Non-fiction: History, Mystery, Science, E-book

This book is by an American who became interested in the story of the hikers that died at the Dyatloy Pass in the Soviet Union.  This story was one of the ones told on the podcast "Jimmy Akin's Mysterious World"  so when I found the book on it, I thought I would read it.  This book tells what we know of the story as well as the author's search for more information and different theories on what might have taken place.  It end with info on the theory that the author thinks is likely to be what happened, but it is something that can not be proven.