I picked up Mockingbird by Charles J Shields because of my deep, undying love for To Kill a Mockingbird and Harper Lee. I was sorely disappointed, and I'm sure you will be too. It basically states all the connections (which I already knew) between Harper Lee and Scout. Basically To Kill a Mockingbird is like her life. Scout's friend Dil is Harper Lee's friend, and fellow author, Truman Capote. The novel is basically a fictionalization of her life. Even the Radleys were based on a real family, which I didn't know, so that part was interesting, but it dragged on for ever and ever! There was a nice bit about how Lee worked with Capote on In Cold Blood, which I also didn't know about, but again, my! Shields drags on!
Another issue I had with Mockingbird was that Shields didn't have Lee's input or permission or approval or anything to write about her life! The novel had no new information from Shields; it was more like a thesis paper with too much research. It was long and boring and I felt like there was no point to reading, and there is certainly no point in me recommending this novel to you!
Read my post on To Kill a Mockinbird here: http://jaymesbookreviews.blogspot.com/2012/09/to-kill-mockingbird.html