The Wizard and the Wormhole — Michael Dahl

Abracadabra, the founder of the Hocus Pocus Hotel has vanished! Charlie Hitchcock and Tyler Yu team up again to solve this mystery and find their friend. But their investigation goes off track two new magicians are at the hotel and the boys are caught up in their performance. Charlie is suspicious of one of them, and thinks he may be behind Abracadabras disappearance. As the boys continue to search for clues, and as Annie Solo, a desk clerk at the hotel, helps them out, the last thing they expect happens Tyler vanishes. Now Charlie and Annie have to work together to solve this double mystery that leads them to believe there is something hidden in the hotel . . . a secret 13th floor.