The Dark Tower is a series of eight books and one short story written by American author Stephen King that incorporate themes from multiple genres, including dark fantasy, science fantasy, horror, and Western. It describes a "gunslinger" and his quest toward a tower, the nature of which is both physical and metaphorical. The series, and its use of the Dark Tower, expands upon Stephen King's multiverse and in doing so, links together many of his other novels. In addition to the eight novels of the series proper that comprise 4,250 pages, many of King's other books relate to the story, introducing concepts and characters that come into play as the series progresses.
The series was chiefly inspired by the poem "Childe Roland to the Dark Tower Came" by Robert Browning, whose full text was included in the final volume's appendix. In the preface to the revised 2003 edition of The Gunslinger, King also identifies The Lord of the Rings, Arthurian Legend, and The Good, the Bad and the Ugly as inspirations. He identifies Clint Eastwood's "Man with No Name" character as one of the major inspirations for the protagonist, Roland Deschain. King's style of location names in the series, such as Mid-World, and his development of a unique language abstract to our own (High Speech), are also influenced by J. R. R. Tolkien's work.
A film serving as a sequel to the events of The Dark Tower was released in August 2017.
Stephen King saw The Dark Tower series as a first draft, initially planning to rewrite it to eliminate continuity errors. However, after revising The Gunslinger, "he is trying to decide how much he can rewrite."