There’s a lot of this saga in Mr. Allport’s 450-page account—how could there not be?—but as one turns again and again to the evidence on offer in the endnotes (more than 60 pages of them), one has a growing sense that Britain at Bay is more than that—in fact, that it might be the single best examination of British politics, society and strategy in these four years that has ever been written. I use the word 'examination' here because the book is much more than a fine narrative account of great personalities and surface actions, of the history of events. It reaches to deeper levels—of geography and grand strategy, and wartime logistics, of shipping logistics and troop deployments.