what's the easiest type of security work to do?

I want to work as a security guard so that I can concentrate working on my new book and still make some money on the side. I heard working security is the easiest type of job to do because not much ever happens there so you can pretty much pull out your lap top and work on your computer for hours at a time untill you'll have to do something. What else type of security work is easy like that?