08 - Lost Continent (Beyond Thirty) by Edgar Rice Burroughs

Originally published as Beyond Thirty, this gripping novel transports readers to the year 2137, where the haunting shadows of World War I have reshaped the world. In this dystopian future, Europe has spiraled into chaos and barbarism, while the Western Hemisphere remains an isolated sanctuary untouched by devastation. The title, Beyond Thirty, alludes to the mysterious line of longitude that the inhabitants of this sheltered region are strictly forbidden to cross. (Summary from Wikipedia)