The Dark Tower is a series of books written by American author Stephen King, which incorporates themes from multiple genres, including 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. King has described the series as his magnum opus. Besides the seven novels that compose the series proper, many of his other books relate to the story, introducing concepts and characters that come into play as the series progresses. After the series was finished, a series of prequel comics followed.
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.