The Secret of the Old Mill (Hardy Boys Mysteries)

HardCover Pub Date: in 1927 06 Pages: 180 in Publisher: Grosset & Determined to learn the secret of the old mill Frank and Joe employ a clever acquired a constellation of ruse to gain entrance entrance only to find themselves trapped How the young detectives extricate themselves from this dangerous situation and unravel mysteries will keep readers tense with suspense! Frank and Joe unravel two mysteries. one involving a counterfeiting case and the other concerned with a national security case their father is working on.