Water Fight! — Michele Martin Bossley

Josie's sister Melissa is too perfect, better than her in everything-except in the pool. Josie dreams of an Olympic swimming gold, and works hard with her Calgary swim team to achieve it. So when Melissa decides to join the team too, Josie is outraged and afraid that, once again, her sister will beat her. But as the big invitational swim meet approaches Melissa acts to help make Josie's dream come true, and forces them both to reconsider the value of sisterhood. Water Fight! is the story of two sisters who overcome sibling rivalry and learn to be themselves.