Franklin W. Dixon 
No Way Out [EPUB ebook] 

A Haunted Maze Has Twice The Dead Ends. Frank and Joe are thrilled to be taking part in the grand opening celebration of a new maze in Cape Breton, Nova Scotia. By solving puzzles — their specialty — they could win a valuable prize! But once they arrive, the teens soon have a new puzzle to solve: The owner and designer of the maze, Chezleigh Alan Horton, suddenly disappears. As the boys make their way through a labyrinth of suspects, they face a new twist. Can Frank and Joe unravel a decade-old riddle to save the renowned mazemaster?