Seventeen-year-old Abby Schoenberg isn't exactly looking forward to the summer before her senior year. She's just broken up with her first boyfriend and her friends are all off in different, exciting directions for the next three months. Abby needs a plan--an adventure of her own. Enter: the letters. They show up one rainy day along with the rest of Abby's recently deceased grandmother's possessions. And these aren't any old letters; they're love...