"When Gargoyles Fly" is an exciting fantasy novel written by Spanish author Carlos Ruiz Zafón. The book tells the story of young David Martin, who becomes a student of the famous writer at the behest of Isabella Boaventura. In the Victoria Garden boarding house, where he lives, David comes across an old edition of a book that contains a number of secrets related to a mortal threat to himself and his loved ones. Zafon skillfully intertwines the story of David with magical elements, mysteries of the past and a tense plot that keeps the reader in suspense until the last page. "When Gargoyles Fly" is an exciting journey into the world of mysteries, where reality intertwines with fantasy, leaving an unforgettable reading experience.