The Pentagon Spy Mystery
Valuable antique weathervanes are being stolen in the Pennsylvania Dutch country. A Navy employee removes a top secret document from the Pentagon. The Hardy brothers try to solve these two seemingly unrelated mysteries.
Readers also enjoyed
The Mystery of the Samurai Sword (Hardy Boys 60)
The Sign of the Crooked Arrow
The Apeman's Secret
The Arctic Patrol Mystery
Mystery of the Whale Tattoo
Hardy Boys 59
The Secret Agent on Flight 101
The Mystery of the Aztec Warrior (The Hardy Boys)
The Secret of Wildcat Swamp (Hardy Boys)
The Viking Symbol Mystery
The Yellow Feather Mystery
Mystery of the Desert Giant
What to read after The Pentagon Spy Mystery
More by Franklin W. Dixon
The Tower Treasure
The Secret of the Old Mill
The Crisscross Shadow
Hunting for Hidden Gold
The House on the Cliff
Shore Road Mystery
Hardy Boys (The Hardy Boys)
While the Clock Ticked (Hardy Boys, Book 11)
Missing Chums
The Great Airport Mystery (Hardy Boys, Book 9)
The mystery of Cabin Island
DEAD ON TARGET (HB #1)