This is one of those big, beautiful art/architecture books that always seem to end up unread on people's coffee tables. But the book is worth reading for the wealth of good info on the buildings, and the photos are nothing less than superb. Modern wide-angle camera lenses that are used to photograph the interiors of buildings, for example, have improved greatly in the last 10-15 years, and the results show.
The most important buildings, from ancient times to modern times are covered, and the text is well done, informative, and not dry as are many books on art and architecture. One of the book's strengths is the coverage of the ideas and practices of important architects who have contributed many of the buildings in this book. The authors also do a good job of covering the social importance and context of the buildings and how they differed from culture to culture.
After reading this book, I would highly recommend Sir Nicholaus Pevsner's An Outline of European Architecture for more reading on that subject. His descriptions of important buildings are often nothing short of inspired, and he is considered one of the greatest and most stimulating writers on the subject who ever put pen to paper.
No architecture book can cover every important building, but this one covers almost all the ones I would have included. It's been said that buildings like the bigger and more elaborate Gothic Cathedrals, with their labor intensive, complex masonry facades and interiors and their ornate lead-glass windows, are the most expensive artworks ever done, costing a billion dollars to replicate today. Important buildings are therefore essential for us to understand if only for the tremendous amount of resources that go into them.
Overall, a fine book on the subject and one that compares favorably with the many other beautiful, large-format books out there on architecture. I've also seen the book for the list price of $65 in retail shops so if Amazon is selling it for $40 I would consider that a great deal for this book.