(From the publisher):
With humankind surviving underground in the twenty-fifth century's last city, courageous man journeys back in time into Cuba's history to try to alter the past and stop the worldwide conflagration that would leave Earth a nuclear wasteland.
Original title: Dead Morn
Genre: Fiction→ Science Fiction→ Bleak Futures→ Nuclear Holocaust/Post-Apocalypse
Fiction→ Science Fiction→ World Versions→ Time Travel