Plugged In; a Clinicians' and Families' Guide to Online Video Game Addiction, by Terry R. Waite.
"Serving in the U.S. Air Force, Terry R. Waite earned his bachelor's and master's in psychology. He returned to California in 1997 and has been providing therapy for children and families in crisis. He enjoys spending time with his beautiful wife, wonderful children, and that darn dog."
I've read the introduction and the first chapter and this is a win! win! book for understanding video game addiction. A must read!