The PENTAGON SPY (HARDY BOYS 61) (Hardy Boys Mystery Stories)

Small-time crooks lead to big-time spies - and the Hardy Boys have no time to lose! While investigating the theft of several valuable Pennsylvania Dutch weather vanes, the Hardys uncover a startling twist in the case. The stolen weather vanes point directly to the nation's capital - and to a serious breach in national security! A classified document has disappeared from the Pentagon. Frank and Joe follow a trail of clues from Pennsylvania to Washington to the Chesapeake Bay. There they confront a ruthless gang of foreign agents determined to make off with top-secret plans for a vital nuclear submarine guidance system!