Mike Flanagan’s upcoming adaptation of The Dark Tower has the potential to be one of the most ambitious Stephen King projects ever brought to the screen. The legendary book series blends horror, fantasy, Western, and sci-fi elements into an epic tale of Roland Deschain’s quest for the titular tower. With Flanagan’s talent for blending atmosphere, character depth, and psychological horror, he seems like the perfect filmmaker to bring this story to life. However, while most fans are focused on how he will adapt the seven main books, one key piece of The Dark Tower mythology shouldn’t be overlooked—The Wind Through the Keyhole.