From the book:

'Until very recently, Anglo-Saxon historians have shown reluctance to allow an understanding of the spirit of the times to help them see Napoleon as anything other than an alien monster. Rival national mythologies have added layers of prejudice which many find hard to overcome.'-xiv.

'Napoleon did not start the war that broke out in 1792 when he was a mere lieutenant and continued, with one brief interruption, until 1814. Which side was responsible for the outbreak and for the continuing hostilities is fruitlessly debatable, since responsibility cannot be laid squarely on one side or the other. The fighting cost lives, for which responsibility is often heaped on Napoleon, which is absurd, as all the belligerents must share the blame. And he was not as profligate with the lives of his own soldiers as some.'-xv.

'In the half-century before Napoleon came to power, a titanic struggle for dominion saw the British acquire Canada, large swaths of India, and a string of colonies and aspire to lay down the law at sea; Austria grab provinces in Italy and Poland; Prussia increase in size by two-thirds; and Russia push her frontier 600 kilometers into Europe and occupy large areas of Central Asia, Siberia, and Alaska, laying claims as far afield as California. Yet George III, Maria-Theresa, Frederick William III, and Catherine II are not generally accused of being megalomaniac monsters and compulsive warmongers.'

'Napoleon is frequently condemned for his invasion of Egypt, while the British occupation which followed, designed to guarantee colonial monopoly over India, is not. He is regularly blamed for re-establishing slavery in Martinique, while Britain applied it in its colonies for a further thirty years, and every other colonial power for several decades after that. His use of police surveillance and censorship is also regularly reproved, even though every other state in Europe emulated him, with varying degrees of discretion or hypocrisy.'

I would say that excerpt helps makes the reviewer's point.