Cooperation. Guest i did. Host why was that . Guest there were several things that were different about this book than my other book. This is the first book i have written that was really at the border of journalism and history. All the other books that i wrote i had covered the underlying story in real time and then wrote about it. This is something, i was alive in the 1970s but i was a kid. So i was really starting from scratch in terms of my research and i discovered that there was a tremendous volume of printed material, in particular 150 boxes of material about the Symbionese Liberation Army and i managed to obtain access to that so i knew i had a great deal of material that no one had ever seen before but obviously just to answer your question i would have liked to have talked to betty hearst. She made clear to media areas wt and indirectly that she wanted no part of this that i realized i had so much material from her and about her, her own book, her own testimony, her fbi inter