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Volume 13: The Mark on the Door
A strange mark on a door leads Frank and Joe into a perilous case involving stolen Native American artifacts. As they delve deeper, they encounter hostile smugglers and treacherous terrain in the Southwest. With the assistance of their father and local law enforcement, the Hardy Boys unravel a complex scheme that threatens both cultural heritage and human lives. Their bravery and quick thinking are put to the ultimate test in this gripping mystery.
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