The Minotaur maze

Every Saturday at noon precisely, the T. Middleton Nightingale City Library is transformed, and today Kelly, one of the library pages, arrives just in time to find herself inside the Labyrinth, confronting the Minotaur with Princess Ariadne; her fellow pages are nowhere in sight--and defeating the Minotaur is only the beginning, because other monsters of Greek mythology are also roaming the confusing corridors, and there seems to be no way out of this maze.