The Umbrella Man of Oz is a proposed trilogy of Oz novels by Charles Phipps. The first two of the planned three books have been published: * The Wooing of Ozma (1996) * The Engagement of Ozma (2003) The third title, yet to be published, is The Marriage of Ozma. As the titles indicate, Phipps's books take a more adult view of Princess Ozma, casting her in a romantic light. Phipps's books are generally considered part of the Alternate Oz literature.