This book appropriately expands earlier versions to include Mesopotamia at the beginning of the survey and more recent material towards the end of the volume.
It is very clearly structured, by time periods, and within, by geographical areas like regions or countries, depending on the period.
The purpose is rather comprehensive with including all most significant names and places in the narrative with specific analyses. Not every building gets proper illustration but that is pretty much the law of the genre and nothing to worry too much about.
By the end of the volume, most readers should have obtained a well rounded impression of Western architecture from the origins to the present day.