Love Walked In by Marisa de los Santos. I found this book, the first novel by poet de los Santos, extremely engaging, and I stayed up way too late finishing it. (What else is new?) It's dually narrated by Clare, an 11-year-old dealing with her mother's intense emotional difficulties, and a 32-year-old lost-ish soul named Cornelia. How their lives intersect is the crux of the story. This would be an excellent beach read. Nice writing, entertaining (if improbable) tale.