Charlie finds himself on the hidden thirteenth floor of the Abracadabra Hotel, where he discovers both Tyler and the magician Brack, who was trapped there by a mysterious figure he could not identify.
Charlie discovers Tyler and Brack missing from the Abracadabra Hotel, and is threatened by evil magician Theopolis to take over the hotel, unless Brack if found and pays his monthly mortgage on time.
Combines two previously published stories, The assistant vanishes, and The trouble with Abracadabra, in which Charlie Hitchcock and Tyler Yu investigate mysterious happenings at the Abracadabra, a hotel for retired magicians.
Tyler Yu, school bully, is convinced that there is a ghost stealing things at Abracadabra Hotel, and he enlists the help of Charlie Hitchcock to solve the mystery.
When the great magician Abracadabra is challenged by the illusionist Theopolis, Charlie and Tyler must solve the mystery of how the illusions were done, or Abracadabra will forfeit the hotel.
Abracadabra, owner of the Abracadabra Hotel, has disappeared, and Charlie Hitchcock and Tyler Yu team up again to solve the mystery of the hidden thirteenth floor and try to foil a theft that could cost the hotel millions.
When the magician Theopolis makes a boy from school disappear during the magic show at the Abracadabra Hotel, Charlie Hitchcock and Tyler Yu are determined to find out what really happened.
When Charlie Hitchcock, the smartest kid at school, gets a note from the school bully, Tyler Yu, demanding a meeting he fears the worst--but it turns out that Tyler wants him to solve the mystery of the missing magician at the Abracadabra Hotel.
