Judy Blume's 1998 novel Summer Sisters follows the lives of Victoria “Vix” Leonard and Caitlin Somers from ages 12 to 30, spanning nearly 20 summers. The story centers on their intense friendship and a love story, while also exploring themes of class, money, and childhood transitions. Shy Vix meets Caitlin at school, and Caitlin invites her into her wealthy family's life on Martha's Vineyard for a few months each summer.