(in no particular order)
The Living and the Dead and the Undead
The Great Divorce, CS Lewis
The Lovely Bones, Alice Sebold
A Brief History of the Dead, Kevin Brockmeier
What Dreams May Come, Richard Matheson
I am Legend, Richard Matheson
World War Z, Max Brooks
Zombie Survival Guide, Max Brooks
Post Apocalyptic Guilty Pleasure Reading
A World Made By Hand, James Howard Kunstler
The Wild Shore, Kim Stanley Robinson
The folk of the Fringe, Orson Scott Card
The Road, Cormac McCarthy
(Illuminating) Fiction and the struggle between Truth and fact
The Things They Carried, Tim O'Brien
The Alchemist, Paulo Cohelo
Till We Have Faces, CS Lewis
The Namesake, Jhumpi Lahiri
Animal Farm, George Orwell
Guilty Pleasure pop-fiction
The Hunt for Red October (and all other Jack Ryan books) up through Executive Orders, Tom Clancy
Jurassic Park, Sphere, Congo, Andromeda Strain, Terminal Man, A Case of Need, Airframe, etc. Michael Crichton
Archangel, Robert Harris
The Firm, The Street Lawyer, The Testament John Grisham
Fictional History / Alternative History
The Years of Rice and Salt, Kim Stanley Robinson
Fatherland, Robert Harris
The Man, Irving Wallace
Historical Fiction
The Winds of War &; War and Remembrance, Herman Wouk
Science Fiction / Fantasy
Lord of the Rings Trilogy & The Hobbit, JRR Tolkein
Red Mars, Green Mars, Blue Mars, and Icehenge - Kim Stanley Robinson
Mother Night
Ender's Game, Speaker for the Dead - Orson Scott Card
Dune
Starship Troopers, Robert Heinlein
Shadows of the Empire, Steve Perry
Post Colonial Dis-jointedness (what happens when the world, as you know it, ends? Does one culture disappear and the other dominate? Or are both changed, for better and worse?)
Things Fall Apart,
Two Leggings, Nabakov
The Dark Child, Laye
The Ambiguous Adventure, Kane
Biko, Donald Woods
