I'm not much of a non fiction fan. I find many hard to get into. I am starting to read more biographies though. The Mitford's are a fascinating family consistently in the media during their lives. This biography (like all) is slightly biased towards Diana as its complied by one of her descendants but I think the letters demention gives perfect snapshots into their complicated lives. It also shows much more of the sisters famous wit and humor - Deborah (Duchess of Devonshire) was a revelation to me! It is long but reads quickly and includes some of the families pictures.