The fourth volume in the official biography--"The most scholarly study of Churchill in war and peace ever written" (Herbert Mitgang, The New York Times).   Covering the years 1916 to 1922, Martin Gilbert's fascinating account carefully traces Churchill's wide-ranging activities and shows how, by his persuasive oratory, administrative skill, and masterful contributions to Cabinet discussions, Churchill regained, only a few years after the disaster of the Dardanelles, a leading position in British political life.   Included are many dramatic and controversial episodes: the German breakthrough on the Western Front in March 1918, the anti-Bolshevik intervention in 1919, negotiating the Irish Treaty, consolidating the Jewish National Home in Palestine, and the Chanak crisis with Turkey. In all these, and many other events, Churchill's leading role is explained and illuminated in Martin Gilbert's precise, masterful style.   In a moving final chapter, covering a period when Churchill was without a seat in Parliament for the first time since 1900, Martin Gilbert brilliantly draws together the many strands of a time in Churchill's life when his political triumphs were overshadowed by personal sorrows, by his increasingly somber reflections on the backward march of nations and society, and by his stark forecasts of dangers to come.   "A milestone, a monument, a magisterial achievement . . . Rightly regarded as the most comprehensive life ever written of any age." --Andrew Roberts, historian and author of The Storm of War