Last Humans and The Earth (Future Navigators)

THE LAST FLEET OF HUMANITY: CHILDREN OF TWO EARTHS (The Final Voyage of Humanity)

THE LAST FLEET OF HUMANITY: CHILDREN OF TWO EARTHS (The Final Voyage of Humanity)

The Last Country on Earth: A Story of Borders Lost, Humanity Found

The Earth As Modified By Human Action: A Last Revision Of "Man And Nature"