The Pol Pot Journals have been replaced with I Am Pol Pot by Steve Otto, the ghost writer. It’s on Lulu but it is supposed to be available on the usual book outlets, such as Amazon and Barns & Noble soon. So it should be available through your local Borders as well as through Barns and Noble.
It is still available at Lulu, http://www.lulu.com/content/5492340.