Dukeness: I do recommend the Colbert/Rackstraw book. It is not about Rackstraw-as-Cooper per se, it is more about Rackstraw's criminal persona, his significant criminal history, the Vietnam years, and the family dynamics. It's well-written and engaging. Worth the money, imho.
As for Principia Media, they are a strange bunch. Not sure what is going on there. Certainly not mailing out media copies. Hmmmm. Bad form, at the very least.