Hardy Boys 09: The Great Airport Mystery (The Hardy Boys Book 9)
Hardy Boys 29: The Secret of the Lost Tunnel (The Hardy Boys)
Hardy Boys 07: The Secret of the Caves (The Hardy Boys Book 7)
Hardy Boys 13: The Mark on the Door (The Hardy Boys)
Hardy Boys 24: The Short-Wave Mystery (The Hardy Boys)
Hardy Boys 10: What Happened at Midnight (The Hardy Boys)
