Skinwalkers by Tony Hillerman

Three shotgun blasts explode into the trailer of Officer Jim Chee of the Navajo Tribal Police. But Chee survives to join partner Lt. Joe Leaphorn in a frightening investigation that takes them into a dark world of ritual, witchcraft, and blood -- all tied to the elusive and evil "skinwalker." Brimming with Navajo lore and sizzling suspense, Skinwalkers brings Chee and Leaphorn, Hillerman's bestselling detective team, together for the first time.