La’s Orchestra Saves the World by Alexander McCall Smith (2009)
After losing her husband, La (short for Lavender) goes to live in a small house in the English countryside owned by her in-laws. The time is the late 1930s and when WWII begins, La occupies herself by helping a local farmer with his chickens and leading an amateur orchestra made up of locals and men from the local airbase.
This is a quiet story about a woman who lives a simple life yet touches the lives of many.
Visit the author's website and read a review from the Washington Post.