Steven Craig Zahler (born January 23, 1973) is an American filmmaker, novelist and composer. After beginning his career working briefly as a cinematographer, Zahler focused on screenwriting until he made his directorial debut with Bone Tomahawk (2015). He followed this up with Brawl in Cell Block 99 (2017) and Dragged Across Concrete (2018), all of which he wrote and composed the music for. He has also authored several novels and graphic novels.