Talking God by Tony Hillerman

In this gripping mystery, Navajo Tribal Police officers Joe Leaphorn and Jim Chee find themselves entangled in a complex web of cultural intrigue and murder that spans from the sacred lands of the Navajo Nation to the bustling streets of Washington, D.C. As they delve deeper into the case, they uncover a plot involving stolen Native American artifacts, political machinations, and a mysterious corpse found on a train. The duo must navigate the delicate balance between traditional beliefs and modern justice to unravel the truth, all while confronting personal challenges and the ever-present tension between their heritage and the outside world.