Hunting for Hidden Gold (The Hardy Boys, No. 5)
The Secret of the Old Mill (Hardy Boys, Book 3)
The House on the Cliff (Hardy Boys)
The Shore Road Mystery (Hardy Boys #6)
The Secret of the Caves (Hardy Boys, Book 7)
The Tower Treasure (The Hardy Boys No. 1)
The Mystery of Cabin Island (Hardy Boys, Book 8)
The Great Airport Mystery (Hardy Boys, Book 9)
What Happened at Midnight (Hardy Boys, Book 10)
While the Clock Ticked (Hardy Boys, Book 11)