We Two, by Gillian Gill, a book about Victoria and Albert's marriage.
It was decently interesting, but my god, the Euro-royals were screwed up in the way they raised their children. If they bothered to view them as anything but paths to power and self-aggrandizement. Victoria and Albert, at least, unlike their parents, loved their children. But the results ... *shudder*
Reading through, I am very very grateful for my parents.