Prosperous Friends by Christine Schutt
Why you should know her: Schutt is the author of Florida, a National Book Award finalist, and All Souls, a Pulitzer Prize finalist. Plot notes: A young couple's insecure foibles are juxtaposed with the story of an older couple who are steadfast but possibly complacent. The result is an intimate look at what lasts. Prose points: The book's style helps reveal how when you're in a relationship, things unsaid speak volumes.