Companion Pieces is a new series of 10-15 minute reads exploring cinematic and literary parallels. In this first instalment, I explore the links between Patrick deWitt’s novel The Sisters Brothers, Jacques Audiard’s recent film adaptation of the same name and the Coen brothers’ The Ballad Of Buster Scruggs. Taken together, these three journeys through the American west reveal how greed, grief and a guilty conscience can be soothed by the simple comforts of family, friendship and home. But the question of what lies beyond their collection of ironic deaths can only be answered by the Coens.   Patrick deWitt’s 2011 Booker shortlisted novel The Sisters Brothers is both a western adventure and a crime caper. Two accomplished killers, the Sisters brothers, travel from Oregon…