Charlotte Mosley always does a fine job of editing these collections of letters by the Mitford sisters. Mosley always provides many footnotes to help the reader place all the action of the letters in context.
Being a long time fan of Nancy Mitford, I very much enjoyed this collection. I also admired, as shown in the letters, Nancy's no fuss approach to her own writing. She knew her limitations as a writer, didn't beat herself up over it, and got on with the business of writing.
Read my full review here at Suite101