The Black Unicorn is A Magic Kingdom of Landover novel by author Terry Brooks. In this novel, Ben Holiday pays one million dollars to buy the throne of the fairyland of Landover, after Ben's wife and unborn child die in a car accident. Ben escapes from his reality by assuming the role of the King of Landover, which is a magical fairyland that is completely different from his role as a big shot attorney in Chicago. Ben, his new girlfriend, the sylph Willow, and the wizard Questor Thews all have vision-like dreams.

They feel that the dreams are premonitions that they must carry out. Ben's dream sends him back to the real world in Chicago. Questor sends him to retrieve the lost books of magic and Willow's dream sends her in search of the golden bridle to capture the elusive black unicorn that's been spotted throughout the land. Each characters heads out on their individual journey to see if their dreams were just dreams, or lead them to find the answers they seek.

Each encounters their own dangers, obstacles and fortunes while carrying out their journeys. When Ben inadvertently brings his archenemy, Meeks the wizard, back into Landover, chaos ensues. Meeks steals Ben's identity as the King of Landover. Ben has to work with his friends, followers, and his inner struggles to determine how to unmask himself and return his kingdom to order.

Ultimately, Ben discovers that he has to believe in himself. Without his own self-confidence, he cannot expect those in his kingdom to look up to him as their leader. Additionally, the novel helps to instill the belief that magic does exist, even in the real world of Chicago. The belief in magic, or the possibility that magic exists, gives people hope.