Once upon a time, a ka-tet of readers found themselves at tor.com on a long quest to reach Stephen King’s Dark Tower. During the journey, the author (or perhaps it was simply ka) tried to throw our hardy band of pilgrims into confusion by telling a new story. Undeterred, their path followed the Beam until the end, and only now, when we know what is at the clearing at the end of the path, do we return to Mid-World once again, to join our old friends for The Wind Through the Keyhole (Dark Tower 4.5, if it do ya).
Welcome. There be spoilers ahead.