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9781101076620 (electronic bk)
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|| Frank and Joe Hardy become involved in a case affecting national security when Joe dials a wrong telephone number and gets the Pentagon. Two words- "Bombay Boomerang"- that the boys hear before the line goes dead plunge them into a whirlpool of danger and intrigue. At the same time, Frank and Joe must save their father from a murderous gang stealing mercury shipments in the Baltimore harbor. With clues linking the mercury thefts to the top secret Super S missile mysteriously stolen from a government arsenal. In a race against time, the three Hardys foil a diabolical scheme to create widespread havoc in the United States.
|| Electronic reproduction. New York : Grosset & Dunlap, 1970. Requires OverDrive Read (file size: N/A KB) or Adobe Digital Editions (file size: 1347 KB) or Amazon Kindle (file size: N/A KB).