The ninth book in the New York Times bestselling Longmire series, featuring Sheriff Walt Longmire.

Cord Lynear, a Mormon lost boy forced off his compound for supposedly rebellious behaviour, shows up in Absaroka County. Without much guidance, divine or otherwise, Sheriff Walt Longmire, his second-in-command Victoria Moretti and his good friend Henry Standing Bear search for the boy's mother and find themselves in a scavenger hunt that ends at the doorstep of an interstate polygamy group. Run by Roy Lynear - Cord's father - the group is frighteningly well-armed and very good at keeping secrets.

As Walt, Henry and Vic pursue the Lynears, they hear whispers of Big Oil and the CIA and find they might be dealing with more than they bargained for.

''The characters talk straight from the hip and the Wyoming landscape is its own kind of eloquence'' New York Times