to the original book. >> of course and as you mentioned, "go set a watchman" was written before "mockingbird", so why did harper lee remain silent for so many years? >> that is a mystery that will always be with us. and perhaps people who read the book and then review the book will have their theories about that. she seemed very content for a long time to have that be her one and only book. now her legacy really, is reopened and maybe opened to revision as we read this second book. and there were hints yesterday about maybe a third manuscript. it's all quite mysterious. there have been a lot of questions about whether the 89-year-old author wants this to be published at all. but her representatives say she does. and one person i know who was able to visit with harper lee recently a film maker, said that harper affirmed she does want this released. a real mystery surrounding this