Having sold more than 350 million copies of his books, Stephen King is a household name around the world. In the standalone Dark Tower novel The Wind Through the Keyhole, Mid-World’s last gunslinger Roland Deschain hunts down a murderous shape-shifter. Finding the site of the creature’s latest killing, Roland discovers a single surviving witness - a terrified boy named Bill Streeter - and calms him with a story from the Book of Eld.