Book seven wasn't very interesting to me. Zosima dies but, everybody saw that coming. Everybody has a melt down when his body starts to smell because, they must believe that Zosima was chosen by God. Because if he was, his body would not have rotted. But, obviously he was not chosen by God.
Book Eight was much more intense and interesting. Dmitri went to kill Fyodor (can't too much blame him :P) but on accident, he almost killed or did kill Gregory! : O THEN, he gets blamed for the murdere of his father which he actually had nothing to do with. I love it. :]