People Of Darkness by Tony Hillerman

In this gripping mystery, a Navajo Tribal Police officer named Jim Chee finds himself embroiled in a complex investigation involving a series of murders linked to a mysterious religious cult and a long-buried secret from the past. As Chee delves deeper into the case, he uncovers a web of deceit, betrayal, and greed that spans decades, all while navigating the cultural tensions between traditional Navajo beliefs and modern influences. The story is rich with atmospheric descriptions of the Southwestern landscape and offers a compelling exploration of identity and justice.