It must have been awful for Diana and Duff Cooper to be separated from their only child during the war, but we can be grateful for it because it’s a joy to read the correspondence it gave rise to. The letters in this book span the years 1939 to 1952 and take in the Blitz, Diana’s short spell as a farmer in Sussex, a trip to the Far East, when Duff was collecting intelligence on the likelihood of a Japanese invasion, the couple’s three years in the Paris embassy, and several more in their house at Chantilly, as well as...