The Tower Treasure (Unabridged): optional

The House on the Cliff (Unabridged): optional

The Secret of the Old Mill (Unabridged): optional

The Tower Treasure (Unabridged): optional

The House on the Cliff (Unabridged): optional

The Shore Road Mystery (Unabridged): optional

Hunting for Hidden Gold (Unabridged): optional

The Tower Treasure

The Tower Treasure: A Hardy Boys Adventure

The Secret of the Old Mill: A Hardy Boys Adventure

The Missing Chums

The Shore Road Mystery

The Secret of the Old Mill: The Hardy Boys Series, Book 3

The Secret of the Caves

The House on the Cliff: The Hardy Boys Series, Book 2

The Mystery of Cabin Island