The Sisters Brothers - Best of Granta by Patrick deWitt

Across 1000 miles of Oregon desert his assassins, the notorious Eli and Charlies Sisters, ride - fighting, shooting, and drinking their way to Sacramento. But their prey isn't an easy mark, the road is long and bloody, and somewhere along the path Eli begins to question what he does for a living - and who he does it for. Filled with a remarkable cast of losers, cheaters, and ne'er-do-wells from all stripes of life - and told by a complex and compelling narrator, it is a violent, lustful odyssey through the underworld of the 1850s frontier.