I've recently started to read "Hackers" by Steven Levy. Actually, this is my second attempt. On my first try, I got stuck in all the talk about railroads in the first pages. This time, I directly went to page 30.
And I have to say (while this might reveal what a incurable computer-nerd I actually am), reading this book repeatedly sent shivers down my spine. And although our computers are several orders of magnitude smaller, and more powerful, the basic fascination is still the same.
It is pretty amazing to see how they came up with all these ideas of interactivity, or time-sharing even then, because it just seemed to be the right thing. Otherwise computers might still be some huge machines sitting in some basements with access restricted by several layers of bureaucracy.
Anyway, if you want to know if you're a computer nerd at hard, take a look at this book ;)