The dark tower

The Dark Tower is the seventh and final book in Stephen King's Dark Tower series.

It follows Roland Deschain, the last gunslinger of Mid-World, as he completes his quest to reach the Dark Tower, a structure that is the nexus of all universes.

Roland's world is crumbling, with time and space distorted, and he must navigate through various dimensions and confront his enemies, including the Man in Black and the Crimson King.

The book concludes with Roland reaching the tower, only to find that his journey is cyclical, and he is transported back to the beginning of the series.

The story blends elements of dark fantasy, science fiction, horror, and Western genres, and is a culmination of King's multiverse, linking many of his other works.