3 Willows is the story of three girls who are about to attend the same high school where the Sisterhood of the Traveling Pants took place. The "Sisters" are mentioned, but they don't have a major role in this story. Jo, Polly and Ama met in third grade and by the end of the 8th grade, they think they are starting to drift apart. They each have different experiences this summer: Ama gets a grant to go to a wilderness adventure camp (much to her chagrin), Jo is spending her summer at the beach with her mother who is having a trail separation from her dad, and Polly discovers her grandmother, who she has never met, was once a model so she tries to make herself over into one, too. The adventures the girls have are very believable. As you read, you get very involved in their lives and the book flies by. Some reviewers say the book is for grades 6 - 10, but I really enjoyed it.