Harry Potter and the Prisoner of Azkaban games loosely based on "Harry Potter and the Prisoner of Azkaban" were also released for several platforms, and most obtained favourable reviews. Harry is back at the Dursleys for the summer holidays, where he sees on Muggle television that a convict named Sirius Black has escaped, though with no mention of what facility he has broken out of. Harry involuntarily inflates Aunt Marge when she comes to visit after she insults Harry and his parents. This leads to his running away and being picked up by the Knight Bus. He travels to the Leaky Cauldron where he meets Cornelius Fudge,
The Magical Worlds of Harry Potter it was "cool that their hero, Harry, was encountering some of the creatures of mythology." Colbert felt that knowing the origins of Rowling's character and creatures increased "the books' magic tenfold" and made the "Harry Potter" universe seem more lifelike. Feeling that he wanted to share this with others, Colbert spent a year researching the references in the novels and collected his discoveries for a guidebook to the magical world of Harry Potter. Colbert wrote "The Magical Worlds of Harry Potter" while teaching a seminar on self-publishing to graduate students at the University of North Carolina. He had it self-published