I can't explain why but I love big, grandiose, melodramatic, 1000-page books about the end of the world. Some of these books I've really enjoyed (some more than others) include:
The Stand by Stephen King
Swan Song by Robert McCammon
The Passage trilogy by Justin Cronin
The Fireman by Joe Hill
The Rift by Walter Williams
Japan Sinks by Sakyo Komatsu
The Living Dead by Romero and Kraus
Blindness by Jose Saramago
Oryx and Crake by Margaret Atwood
Station Eleven by Emily St. John Mandel
Lucifer's Hammer by Larry Niven and Jerry Pournelle
Nuclear War: A Scenario by Annie Jacobsen
I'm all ears, thank you!
by addressunknown