Sunday Salon: The End of the World Challenge

Becky is hosting The End of the World Reading Challenge II over at her site, the challenge started on March 10th and runs till October 9th.
The Rules - copied from her page:

Read at least four books about "the end of the world." This includes both apocalyptic fiction and post-apocalyptic fiction. There is quite a bit of overlap with dystopic fiction as well. The point being something--be it coming from within or without, natural or unnatural--has changed civilization, society, humanity to such a degree that it radically differs from "life as we now know it." (Aliens, evil governments, war, plague, natural disasters like earthquakes, tsunamis, volcanoes, hurricanes, depletion of resources, genetic manipulation, etc.) Here is a wikipedia article on the subject. Also see here. These changes can be small-but-still-significant or huge-and-life-threatening.

Books can be classified as children's, young adult, and adult. (Not many children's books go there. But many teen books do. And they're great.)

Graphic novels can count for this challenge.

Audio books allowed.

Crossovers with other challenges are allowed.

You may have one reread that counts toward the challenge. But most should be new-to-you. (Exception: If you read it several years ago, and you can honestly swear that you don't remember anything about it...then I won't stop you from counting it towards the challenge. I know I've forgotten books I read a decade ago.)

I tried resisting this one, but realsied that a lot of books I'm already needing to read could be incorporated - I tend to find if books overlap I get there much faster.
I come up with 6 books, not sure if I'll read them all:
Z for Zachariah (I've been meaning to read this for ages).
On the Road, McCarthy
Do Androids Dream of Sheep? A 1001 book
Uglies, Scott Westerfield - will be reading for Becky's mini-challenge
Cat's Cradle, Vonnegut - A 1001 book
We, Zamyatin - 1001 book