The Disappearing Floor (1977)1 of 25
TitlesThe Hardy Boys/Nancy Drew Mysteries, The Mystery of the Haunted House, The Flickering Torch Mystery, A Haunting We Will Go, The Disappearing Floor, The Mystery of Pirate's Cove, The Mystery of Witches' Hollow, The Mystery of the Diamond Triangle, Mystery of the Fallen Angels, The Mystery of the Flying Courier, The Mystery of the Ghostwriters' Cruise, The Secret of the Jade Kwan Yin, Mystery of the Solid Gold Kicker, The Secret of the Whispering Walls, Wipe-Out
LanguagesEnglish