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Volume 2: The House on the Cliff
In The House on the Cliff, the Hardy boys face their most dangerous case yet. When their father goes missing while investigating a smuggling ring, Frank and Joe must unravel the mystery of an old house perched precariously on a cliff. As they dodge threats and decipher clues, the brothers race against time to find their father and bring the criminals to justice.
Key Points:
Higher stakes with Fenton Hardy's disappearance
Introduction of coastal setting and nautical elements
Themes of family loyalty, bravery in the face of danger
Notable characters: Aunt Gertrude (making her first appearance), Coast Guard officers
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