Those who have become familiar with the N. Y. Times maps have felt the urge to save them for future reference. Few of us did so. Now comes this collection of 74 of the best, with extended captions elucidating the maps, and providing a running history and analysis of the areas of warfare, the causes, the results. Dates are sometimes deliberately omitted, so as to keep the maps from seeming to be outmoded while the facts, geographically and economically, are still important as shown.