Neil Strauss' Emergency and Peter Heller's The Dog Stars.

I read the piece in the New Yorker about rich tech guys and their bug out plans for the apocalypse (including Reddit's Alex Ohanian).

I love Strauss' journey from survivalist to community volunteer. It changed the way I think about preparedness.

Heller's book is one of only a few that I find myself thinking about all the time. I'm a sucker for any book with a dog in it though, so that might color my opinion.