While spying on her New York City neighborhood with a new friend, Annie, twelve-year-old Harriet decides that the only way to learn Annie's many secrets is to spy on her, as well.

The house seemed to sit apart from the others on Katydid Street, silent and alone, like it didn't fit among them. For Violet Hart-whose family is about to move into the house on Katydid Street-very little felt like it fit anymore. Like their old home, suddenly too small since her mother remarried and the new baby arrived. Or Violet's group of friends, which, since they started middle school, isn't enough for Violet's best friend, Paige. Everything...