Dead mountain-the untold true story of the dyatlov pass incident

The theory that I read was that somehow the snow became unstable. And they were afraid of an imminent avalanche. So they fled the tent in a hurry. They ended up in three groups. One group began to freeze to death, started a fire, and eventually froze to death. Second group tried to climb back towards the tent to retrieve clothes and sleeping bags. They froze to death along the way. Third was alive when the avalanche hit, and it buried them so they weren't found until spring time.

Does the book propose a different turn of events?