"Mr. Wylie puts the date of the invasion's opening moves in April. A Jap scout bomber is spotted over the Aleutian Islands. Within two weeks Alaska has fallen. By June the Japs have reached the great airplane plants in the Northwest. As one man, a hundred thousand German, Italian and Jap fifth columnists rock the country with explosions, wrecks and sabotage. At about this time, Germany moves toward the Atlantic Coast and Mr. Wylie's full-scale Battle of America is on. For drawings of how it might look, turn the page..."
http://books.google.com/books?id=K04EAAAAMBAJ&pg=PA16
http://books.google.com/books?id=K04EAAAAMBAJ&pg=PA16