"Of her two granddaughters, Grandma Yvette clearly prefers Ruby Taylor's perfect--and perfectly Jewish--cousin, Sarah. They do everything together, including bake cookies and have secret sleep overs that Ruby isn't invited to. Twelve-year-old Ruby suspects Grandma Yvette doesn't think she's Jewish enough. The Jewish religion is matrilineal, which means it's passed down from mother to child, and unlike Sarah, Ruby's mother isn't Jewish. But when Sarah...