The Sisterhood of the Traveling Pants is a series of books by Ann Brashares. It is about a group of girls named Bridget (the leader), Lena Kigales (the shy and beautiful), Carmen (the dramatic one), and Tibby (the rebellious girl). These girls find a pair of pants that fit all four of them, though one girl is fat, one girl is short and one girl is super thin. There are 4 books in the series. It was made into a movie in 2005.