This summer nine-year-old Sarah is dreading the first day of summer vacation. It will be her best friend's birthday, and stuck-up Valerie Miller will ask Paige to join her silly Double-Digit Club, a group that ignores girls who are not ten yet. If Paige says yes, Sarah will have no friends for the whole summer because her birthday isn't until the end of August. Even though Sarah and Paige have promised to be "last, best, and only friends," Sarah is not sure Paige will be able to pass up the chance to be accepted by the most popular girls in school. In this heartfelt novel, a girl discovers the meaning of true and honest friendship and learns to face the future as a wiser and more open person.