Neville Chamberlain was nothing if not a diligent correspondent. Every week he wrote to his sisters Ida and Hilda letters that were in effect a diary of everything he was doing politically. They have long been invaluable for historians in archive form, but now they have finally been published in extenso, along with a scholarly fifty-page introduction and helpful footnotes by their very diligent editor, Robert Self. There is also a glossary of nicknames so that readers will be able to identify ‘The All-Highest’ (Lord Curzon), ‘The Goat’ (Lloyd George), ‘Our Herb’ (Herbert Samuel), and so on. Self marks the triumphant conclusion of a five-year endeavour with this, the fourth and last volume, which covers Chamberlain from January 1934 until his death in November 1940.