I came to this book thinking that it would focus entirely on the political dimension of Napoleon's life. This is not the case. Napoleon: A Political Life might exclude the word 'political' from its title and be just as fitting, for Englund spends a great deal of time on Napoleon's relations with Josephine, his brothers, the exiles, etc.. In fact, in the introduction (at the end of the book), Englund states that he almost subtitled the book "Empire of Circumstance."
The great strength of the book is its writing style. Englund really captures the drama of the Little Corsican's life, and he sweeps the reader up in it. All of the politics of Napoleon's life is, as you would expect, well covered, but so is his personal and military life. Never did I feel overburdened with detail, and never was the text wanting for humour.
There is, however, some merit in the argument posted by some of the other reviewers that the book assumes too much in the way of background knowledge. This is not an introduction to Napoleon for the novice. While I would not go so far as to say that you need have already read another book on Napoleon to enjoy Englund's work, you should certainly have a reasonable idea of the political zeitgeist he worked in, particularly the French revolution and the foreign (especially British) reaction to it. Ideally, you should also have taken a course in French at some point in your life (and not completely forgotten it). Englund has a somewhat irritating habit of dropping les mots francais at random, and often without translation (although most of the more important French phrases are translated, most of the minor ones are not). C'est la vie.
One of my favourite parts of the book was the analysis of Napoleon's legacy: his admirers and detractors, whence he is glorified, and whence he is ignored. Englund is the most balanced Napoleonic author I have yet encountered, seeming to genuinely sympathize with (and synthesize from) those who love and those who hate the l'Empereur.
Perhaps the highest compliment for a book, I plan to reread this one.