From 1933 to 1951, Jack Armstrong, The All-American Boy was one of the first and most memorable of the adventure radio serials. Now, for the first time, one of the most exciting Jack Armstrong sagas has been novelized and is available from Radio Archives as a 12 hour audiobook. What is U-77, and why does Dr. Romago, a scientist who abandoned his native United States before World War II, seek it? Jack can only guess. But if Romago wants it, he can't be permitted to have it. Accompanied by loyal friends, Jack heads down to the Sea Islands off the Southern Atlantic coast, where Romago has been driving away the local fishermen. Jack Armstrong and the Secret of U-77 take Jack and his friends from New York City to the coast of Georgia down to the bottom of the ocean in this exciting 12 hour long saga.