Anna Pigeon, National Park Ranger, is busy salving and binding the blistered feet of forest fire fighters, when other duties beckon. Before too long she is part of a team heading into the mountains and they are unluckily caught in the path of a turned fire. Each person knows the drills that must be followed for survival, but one man is already injured. They do their best, but after the firestorm roars over them, some of the team are dead.
Anna is not just an EMT - she has law enforcement duties, and she notices inconsistencies - like how did a person get stabbed in the middle of the blaze? The team can't descend the mountain yet and is running low on supplies so as Anna gets to know the men and women sitting with her in the hot ashes, she faces the fact that one of them is a killer.
This is an excellent, intelligent read.