The Magical Worlds of Harry Potter An updated version of "The Magical Worlds of Harry Potter" was published in 2004 by Berkley Books, just before the film "Harry Potter and the Prisoner of Azkaban" was released. Colbert wrote and published "The Magical Worlds of Narnia" in 2005, a guide to the fictional Narnia universe. The Magical Worlds of Harry Potter The Magical Worlds of Harry Potter: A Treasury of Myths, Legends, and Fascinating Facts is a guide to the fictional "Harry Potter" universe, written by David Colbert. It explores the references to history, legends, and literature in J.K. Rowling's "Harry Potter" novels. Colbert conceived the idea
Harry Potter and the Methods of Rationality of "HPMOR" spontaneously burped itself into existence inside my mind, so it came out as a Harry Potter story. ... there's a large number of potential readers who would enter at least moderately familiar with the Harry Potter universe." He states that his work on rationality "informs every shade of how the characters think, both those who are allegedly rational and otherwise". He also used it to assist the launch of the Center for Applied Rationality, which teaches courses based on his work. Unlike J. K. Rowling's original books, in which the orphaned Harry Potter is raised by the abusive