That's the thing about zombies. They don't adapt and they don't think. Literally, you could have a zombie on one side of a chain link fence and you could be on the other side and they could be trying to get to you and six feet down could be an open door and they will not go through that door in the fence. That's why they're so scary.

I think 'G.I. Joe' is a perfect example of how I'm the world's worst businessman. If I were smart, I'd be writing 'World War Z Part 12', but I have to go where the muse leads, and I've always been a huge 'G.I. Joe' fan. I always wanted to know more about these characters, these little plastic figures I played with as a kid.

I wrote 'The Zombie Survival Guide' because I wanted to read it, and nobody else was writing it. All I've been doing with everything I've written is answering questions that I had.

Since 2001, people have been scared. There's been some really scary stuff that's been happening - 9/11, Iraq, Afghanistan, Katrina, anthrax letters, D.C. sniper, global warming, global financial meltdown, bird flu, swine flu, SARS. I think people really feel like the system's breaking down.

Lies are neither bad nor good. Like a fire they can either keep you warm or burn you to death, depending on how they're used.

Fear is the most basic emotion we have. Fear is primal. Fear sells.

I think that most people would rather face the light of a real enemy than the darkness of their imagined fears.