Ethel & Ernest
You all may remember a picture book (later turned into an animated short) called The Snowman -- written and illustrated by Raymond Briggs. It's a lovely and wonderful thing, and if you're in your twenties, you probably know it well (and may be re-reading or re-watching it for the holidays).
While thus enjoying yourself, you might also check out one of Briggs' other books: his biography of his parents, Ethel & Ernest. It's a quiet, lovely story about two people spending their lives together as the twentieth century unrolls itself around them. We recommend it.