Pure of Heart (Wilderness, #54)

Nate King likes to think he's taught his family everything they need to know about living in the wilds of the Rocky Mountains. And now they're about to be put to the test. What was supposed to be a fun trip up to the high country quickly turns into a desperate struggle just to survive. From rattlesnakes to a flash flood, Mother Nature has unleashed a bitter arsenal. But the worst threat of all comes from mankind as four vicious murderers stalk the forest, ready to finish off anyone left alive.