"The Dark Tower" is a series of eight books written by Stephen King that blends elements of fantasy, horror, and western genres. The story follows the journey of Roland Deschain, the last gunslinger, as he seeks the elusive Dark Tower, a mystical structure that holds the fabric of reality together. Throughout his quest, Roland encounters various characters and challenges that test his resolve and morality. The series explores themes of fate, sacrifice, and the nature of good and evil. It features a rich tapestry of interconnected worlds and draws on numerous influences, including Arthurian legend and American folklore. The narrative is known for its complex structure and deep philosophical undertones.