The Churchill Documents: Volume 20: Normandy and Beyond May-December 1944 is, like the previous 19 volumes, a mammoth undertaking. It numbers more than 2,500 pages and weighs in at a hefty 5 pounds. Commencing with Churchill’s speech to the Dominion Prime Ministers’ Conference on May 1, 1944 at 10 Downing Street, the volume charts the course of events through to Churchill’s return to London from Athens in the last days of 1944. The documents include correspondence (written by and to Churchill), diary entries (John Colville, Commander Thompson, Harold Nicolson), meeting minutes (War Cabinet, Chiefs of Staff committee, Combined Chiefs of Staff), Hansard, speeches, newspaper articles, and excerpts from memoirs (Churchill, Anthony Eden). As with the previous documents volumes, the documents are selected and annotated with expert skill. The well-prepared index provides for effective navigation of the huge volume. For example using the index, a reader can follow the saga of General Sir Noel Mason-MacFarlane, the chief commissioner of the Allied Central Commission in Italy, from the blistering cable Churchill sent to him on June 11, 1944 demanding an explanation for his actions, the general’s contrite reply the following day, and the announcement on June 18th that Mason-Macfarlane had asked to be relieved of his appointment and return to England on “medical grounds.” Volume 20: Normandy and Beyond May-December 1944 is a great accomplishment and essential for all Churchill collections.