The House on the Cliff (Unabridged‪)‬

The second of The Hardy Boys' series, The House on the Cliff involves Frank and Joe, along with their father, the famous detective, in the investigation of a supposed haunted house along with run-ins with smugglers, kidnapping, danger, and a mysterious character. A prime example of the Stratemeyer Syndicate's style, early Hardy Boy books influenced many other YA adventure series including Nancy Drew.