King’s “The Dark Tower” series first began in 1982 with the publication of “The Gunslinger” and continued for seven more novels, the last of which was published in 2012. An eclectic mix of horror, fantasy and the Western genres, the series revolves around Roland Deschain, a member of a knightly order known as the Gunslingers traveling to the titular tower, said to be the nexus point of ever universe. In addition to the sprawling main series, the “Dark Tower” also crosses over with other King books, featuring many of the most famous characters and locations from the celebrated horror author. Flanagan is best known for the series he created at Netflix with Intrepid, including the two “Haunting” limited series and “Midnight Mass.” His final show for the streamer created under his previous overall deal, the Edgar Allan Poe adaptation “The Fall of the House of Usher,” is currently in post-production and expected to release next year.

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