The Tenderness of Wolves by Stef Penney

Canada, 1867. A young murder suspect flees across the snowy wilderness. Tracking him is what passes for the law in this frontier land: trappers, sheriffs, traders and the suspect's own mother, desperate to clear his name. As the party pushes further from civilisation, hidden purposes and old obsessions are revealed. One is seeking long-lost daughters; another a fortune in stolen furs; yet another is chasing rumours of a lost Native American culture. But where survival depends on cooperation, their fragile truce cannot afford to be broken, nor their overriding purpose - to find justice for a murdered man - forgotten.