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 film in 2005.