Harry Potter and the Philosopher's Stone (video game) standing on a trap door which is guarding the Philosopher's Stone, a magical object which grants the user immortality. When Harry is almost killed during a game of Quidditch, by what appeared to be Professor Snape uttering a curse at him, Harry concludes that he is after the Philosopher's Stone. Harry, Ron and Hermione set out to stop Snape from retrieving the Philosopher's Stone by putting the three-headed dog to sleep with music and going through the trapdoor. The three face a series of obstacles that protect the stone which includes surviving a deadly plant, catching a flying key, playing
The Magical Worlds of Harry Potter approval from Rowling, and has since received positive reviews from critics. An updated version of "The Magical Worlds of Harry Potter" was published in 2004 by Berkley Books. "The Magical Worlds of Harry Potter" explores the references to history, legends, and literature in J.K. Rowling's "Harry Potter" novels. David Colbert, the author of the book, told the "St. Louis Post-Dispatch" that the "Harry Potter" novels "are [...] literary treasure hunts for [Rowling's] readers. What seem like funny-sounding names and places and excursions into fantasy all have a basis in either history, myth or legend." He added, however, that he thinks