As the world begins to unravel, they discover that Earth has been divided into distinct time spheres: Remains in the present day (1966).
The duo eventually travels to a futuristic Mexico, thousands of years ahead of their own time. Here, they learn that the "present" world is an experiment by an unknown intelligence and that most of these temporal zones are "ghost worlds" destined to vanish soon. The novel ends with Richard choosing to remain in this future civilization, while John returns to his own time. Major Themes October The First Is Too Late
If you are looking for a physical copy, several editions are available from various merchants: As the world begins to unravel, they discover
Have become a "Glass Plain," a desolate, fused landscape from a far-distant future where the sun has burnt out. The novel ends with Richard choosing to remain
Reverted to 1917, where World War I is actively raging.