The Private Wire To Washington: The Inside Story Of The Great Long Island Spy Mystery That Baffled The Secret Service is a book written by Harold MacGrath and published in 1919. The book is a captivating account of a spy mystery that took place on Long Island during World War I, which had the Secret Service baffled. MacGrath takes readers on a thrilling journey as he unravels the intricate web of espionage that threatened national security during...