It was hard book to rate. What should have become the source of knowledge about Parthenon for me in reality is a futile attempt to justify vile deeds of Lord Elgin, the thief who stole precious work of art from Parthenon and bring it to Britain. Mary Beard's work still contains some interesting facts about Parthenon, although they could be written as well in short tourist brochure. Apart from being useful but verbose tourist guide its also a book about discourse centered around Elgin Marbles. As such it is rather interesting and worth reading, and therefore I would set a better rating did it not try to force the certain point of view, that the Marbles belong to Britain no matter why and should stayed there for eternity. That unjustified and unfair position I could not approve, and therefore, assess the book at lowest rating possible. Let me walk we through the book to support my point.
Had the book really been devoted to story at the temple, it would have started with the building of Parthenon, or with it current condition, or with some pre-Parthenon stories. Meanwhile it starts with Elgin's misdeed and Byron's indignation about it. After the real topic is presented, the author then tries to justify the crime by various sophistic tricks. They mainly fall under one of the three categories: vandalizing is good if it helps preserving what's left, those who blame the vandals are the vandals themselves, and the latest but the most important sophism everything is questionable and there is no ultimate truth.
At first, Mary tells us about story of the temple and shows, that Parthenon isn't just a precious work of art, but also maleficent symbol of Athens dominance over inferior Greek policies. After that, she goes to the first vandals of Parthenon - Christians and Muslims, and says that maybe the damage they made to convert the temple into church and mosque accordingly, is not so unforgivable since it save the temple from destructions. Since while it was a working holy place it was kept in satisfying condition.
Then she reach the position where Parthenon was blown up in 17 century and shows us in colorfully the ultimate destruction the temple suffered. That means, no much had left when Elgin arrived in the begging of 19th century, and less would have left whether the lord hadn't stole it. The author directly support Elgin's deceitful excuses that he was afraid that nothing would be left from Parthenon in several decades. That two liars knew for sure, that Parthenon stays mostly untouched for two centuries after the explosion, and finally got under safe care of newly created Greek government less than in 3 decades after Elgins crimes. Nothing in its history bring more damage to the temple than lord Elgin.
To lure the reader from that decision she attacks with new artillery: Greek archeologist themselves are vandals, since they tried to restore Acropolis in its ancient Pericles state, and destroyed everything that was build after. From my perspective that is clearly a missed shot, since the Parthenon is not only a historical building, it's a work of art, a World Wonder and it worth preserving and restoring, while squalid buildings of Turkish garrison do not.
After blaming the only good guys in the story Mary walks into another British failure. As you remember, Elgins claim was that his intensions were to save stolen fragment of Parthenon of the future generation. While he succeeded in it by selling the Marbles to British Museum, the museum wasn't the best keeper for them. In the begging of XX century Lord Duveen, peevish entrepreneur and philanthropist, managed to get access to the ancient marbles and tried to "clear" it for what he believed is dust. This corrupted incident was backed up by the museum and never fully investigated, and therefore casted a shadow on the Britain and its ability to preserve the Marbles untouched. Mary didn't find better solution than just claim that it's not an issue at all, and that harm was minimal. She also tries to diminish fair anger caused by the incident and ridicule it.
At the end, Mary comes to the question, which she really what to answer: if the Marbles should stay in Britain or it should be returned to Greece. Although she doesn't say it out loud, it becomes clear, that the stolen fragments should stay in her motherland. Multiply arguments she created for that claim, logically are just the same - why not Britain. Apart from the obvious fact, that even her mind wasn't been able to suggest single argument why it should be Britain specifically, for many non British people, along with British people who has heart and conscience, such as Byron, the claim it only laughable. Of course stolen does not belong to the thief. There is only one logical answer to that question, yes, parts of the Parthenon should be reunited with the building, in Athens, Greece, end of discussion.