---Many undecideds may happen to stumble on an interview with one of these guys. That's more effective than just hoping they go out and buy a book---
Very true, but if the book sales remain at the top of the charts the vets will be pretty hard to ignore, and the money from the sales will fund further ads.
Books are nothing compared to images and audio, e.g. Abu Garib. As long as it is just a book out there this story goes nowhere. To have legs the eyewitnesses must get audio/visual exposure nationally on TV. Even then it may go nowhere as was seen with the Clinton debacle.