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From the bestselling author of the generation-defining series The Baby-sitters Club comes a series for a new generation! Friends forever!Karen and her best friends Hannie and Nancy call themselves the Three Musketeers. They do everything together. And now that it's summer, they have big plans to play, play, play! But then Hannie and Nancy make plans without Karen. And Karen is mad. Really mad. What happened to the Three Musketeers? Ann M. Martin is the creator of The Baby-sitters Club, which has more than 190 million books in print, making it one of the most popular series in the history of publishing. Her novels include A Corner of the Universe (a Newbery Honor Book), Belle Teal, Here Today, A Dog's Life, On Christmas Eve, and the Main Street and Family Tree series, as well as the much-loved collaborations P.S. Longer Letter Later and Snail Mail No More, with Paula Danziger. Ann lives in upstate New York.