It's the End of the World as We Know It

This is probably my favorite genre of Young Adult Fiction. Post-Apocolypse or otherwise the end of the world. I seriously can't get enough. This challenge is hosted by Becky's Book Reviews. Here are the details of the challenge.

Read at least four books about the end of the world.

My list (with links to my reviews):

1. City of Ember by Jeanne DuPrau
2. Uglies by Scott Westerfield
   
3. Little Brother by Cory Doctorow
4. Gone by Michael Grant