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

With two cases in tow, the Hardy boys look to Turner mill for clues. Determined to learn the secret of the old mill, Frank and Joe employ a clever ruse to gain entrance, only to find themselves trapped. How the young detectives extricate themselves from this dangerous situation and unravel mysteries will keep readers tense with suspense!

• The Missing Chums (Hardy Boys, Book 4)
• The House on the Cliff (Hardy Boys)
• Hunting for Hidden Gold (The Hardy Boys, No. 5)
• The Tower Treasure
• The Shore Road Mystery (Hardy Boys #6)
• The Secret of the Caves (Hardy Boys, Book 7)
• 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)
• The Tower Treasure / The House on the Cliff (The Hardy Boys, 2 Books in 1)