If you're the least bit interested in the psychology that surrounds video games, please check out Dr. Yee's Daedalus Project. Massively points out various additions to the site that I will have to make of reviewing myself.
His works have spanned several years worth of research. He writes well and does so from perspectives of both researcher as well as gamer. I quote him several times in my book and think he's absolutely well worth your reading time.
