This collectible Hardy Boys 5-book boxed set is perfect gift for aspiring detectives or longtime fans! The first five books in the classic mystery series are packaged together in a collectible box set featuring a beautifully designed slipcover. Titles included are #1 The Tower Treasure, #2 The House on the Cliff, #3 The Secret of the Old Mill, #4 The Missing Chums, and #5 Hunting for Hidden Gold.