The Lost Continent (Original Title: Beyond Thirty)

It's 2137 A.D. To civilized Americans, Europe exists only as a legend, an ancient mythic land, a civilization that went mad back in 1914 and tore itself to pieces in a blood-mad frenzy, forcing America to cut off all contact for its own protection. No American has seen Europe or any European for more than two centuries.

But now, a combination of bad weather and a subordinate's treachery forces Lieutenant Jefferson Turck of the Pan-American Navy across that line. He finds himself marooned at ...