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?