This book sets out to present one work of art from 500 different artist. This sounds good in theory, but since all the artists and their one work of art are listed alphabetically, the end result is eclectic and chaotic. This would have been a much better book, had the same contents been arranged chronologically or at least thematically. As it stands though, the paintings (there are a few sculptures and installations here and there, but I will mostly refer to just paintings) jump all over the place in time and subject. It also seems unfair to have some amazing, iconic painters reduced to just one work of art, which is hardly representative of their overall contribution, whereas others (especially some of the more contemporary artists) could easily have been left out of the book altogether.
The print quality might have been ok 20 years ago (my copy is the 1994 large format coffee table version, not the more recent 2005 pocket size edition), but is below average by today's standards. The resolution is acceptable, but the colours are quite dull. Also Many of the photos also display a strange yellow and orange colour cast, making the paintings look worse than they should.
The captions provide adequate details both about the paintings and the artists. You will learn a detail or two about the paintings, the lives of the artists and even a few fun facts every now and then. It is somewhat sad though to read references to all sorts of other paintings done by the same artists. The format of the book dictates that we can only see one painting per artist and to see the rest, we would have to turn to other books or the internet.
The selection of artists has a decidedly Western and Christian bias. There are a few Japanese and South-American artists here and there, but the overwhelming majority are from mainland Europe and English speaking countries. Also the depicted scenes (at least until the beginning of the 20th century) are from either Roman or Christian mythology or Western European aristocratic and everyday life. After a while, seeing the same scenes over and over again, even if depicted by different artists, becomes quite monotonous and boring.
The book covers a vast range of genres. As a consequence, you may find your favourite genres either under-represented or too many examples from genres you don't care about. I found myself paying closer attention to the art from around the 16th until the middle of the 19th century, which I consider the golden age and pinnacle of painting. Art from before the 16th century is a bit too simplistic for my taste and with the rise of photography in the 19th century, painting seems to have lost focus and spiralled into an identity crisis, from which it has yet to recover. Impressionism was as an interesting experiment and the last of the tolerable departures from traditional painting, but everything after that - I just found myself turning the pages without even looking at the names of the authors of yet another solid cube, formless splatter or weird installation. It is a matter of taste of course, but I found too much art I didn't care for and thus will most likely not be keeping the book.
There are also some fairly obvious errors in the book, where the captions talk about one painting, but the picture is of a completely different one altogether. One example is on page 98. The picture is of a beautiful landscape painting by the venerated landscape artist Frederic Church. However the captions talk about an active volcano Cotopaxi supposedly being in the painting, which actually is nowhere to be found. Only a Google image search turns out another equally impressive painting by the same artist, where a volcano named Cotopaxi can be clearly seen, but it is obviously a completely different painting from the one in the book. I caught the error purely by chance just by browsing around and I haven't read the captions of all the art pieces, so who knows, how many similar errors are in the book.
In conclusion, with either a chronological or thematical arrangement, this would have made a passable art book. Unfortunately the paintings are arranged alphabetically by artists, which provides for a very chaotic reading experience. If you take it as a coffee book only to browse here and there, this book is ok, even if the quality of the repros is below average. If however you are interested in only certain time periods or art styles, you'd be better off purchasing a more focused book with better quality prints. If however you want to own just one book on art, I recommend the immeasurably better and magnificent "Art" by DK, which is my opinion is one the best books on art ever published.