Click the red "ORDER FORM" link in the upper right.
"Confessions of the Game Doctor" is a great read. Bill Kunkel is an entertaining writer, and the best stories from back in the day have little to do with video games themselves; it's the debauchery that went on that is the real fun stuff.
I think the Rolenta Press titles are sold direct almost without exception. I did find new copies of their most popular title, "Phoenix: The Fall & Rise of Videogames (3rd Edition)" on Amazon but even there Rolenta was listed as the seller.