Michael Grant was an English classisist, numismatist, and author of numerous popular books on ancient history. His 1956 translation of Tacitus’s Annals of Imperial Rome remains a standard of the work. He once described himself as "one of the very few freelances in the field of ancient history: a rare phenomenon". As a popularizer, his hallmarks were his prolific output and his unwillingness to oversimplify or talk down to his readership.
Great companion book to have while reading Ancient Greek or Roman history. Full of important wars, main city layouts, the Roman Forum, trade routes, and other relevant history such as the birthplaces of different Greek thinkers or the conquests of Alexander the Great.
It has been helpful while making my way through HG Wells’ Outline of History.