Hardy Boys 02: The House on the Cliff (The Hardy Boys Book 2)

Hardy Boys 03: The Secret of the Old Mill (The Hardy Boys Book 3)

Hardy Boys 04: The Missing Chums (The Hardy Boys Book 4)

Hardy Boys 05: Hunting for Hidden Gold (The Hardy Boys Book 5)

Hardy Boys 01: The Tower Treasure (The Hardy Boys Book 1)

Hardy Boys 07: The Secret of the Caves (The Hardy Boys Book 7)

Hardy Boys 08: The Mystery of Cabin Island (The Hardy Boys Book 8)

Hardy Boys 11: While the Clock Ticked (The Hardy Boys)