The fourth summer of the sisterhood, Forever in Blue by Ann Brashares, is a really good book! The first three books in this series are: Sisterhood of the traveling pants, the second summer of the sisterhood, and Girls in Pants. I highly recommend that if you like books about friendship and loyalty and trust and believing in yourself and knowing you always have someone to kind of storyline then you should definately pick this or these books up. You'll love it! Anyone else read any of these books?