The former is among the more fascinating biographies I've read (not that I've read many), but then with the Mitford family you get the idea that fascinating biographies just write themselves - so many strong personalities and radically different politics among the seven siblings. Interesting to get such an unusual perspective on Hitler, as well.
Besides that, Thomas Malory's Le Morte d'Arthur which so far is... not what I expected. I love some of the expressions and phrases used, but on the whole it's mystifying me how a work like that, unabashedly summarizing and copying earlier works, can be as seen as a major classic.