In the penultimate book of the Dark Tower epic, a series of revelations shed some light on the mystery of the quest that has defined the lives of Roland Deschain and his ka-tet.
When Susannah Dean is transported through a magical door from Calla Bryn Sturgis to New York City in 1999, the demon-mother Mia, who has taken over her body, has one singular purpose: to give birth to her child in a specific location in Manhattan, according to the instructions of the satanic Crimson King. Jake, Father Callahan, and Oy rush to follow her, attempting to prevent an act that would hasten the destruction of the Dark Tower and, subsequently, all parallel worlds. Meanwhile, Roland and Eddie "fall" into Maine, in the summer of 1977, a world that could be considered idyllic but is not. First and foremost, it is entirely real, and bullets whiz around them. And then, there lives the author of a novel titled "Salem's Lot," who is as shocked by them as they are by him...