Here is a very rigorous biography, written by an atheist seriously orientalist but of great intellectual honesty! As he stated pertinently, the atheistic vision of religion can also be interesting to read, sometimes even richer than that of a believer kneaded certainty and devoid of critical spirit. So I found this interesting biography and read it with great interest, while making sense of things. But I'm still mixed ... On one hand, the personality of Muhammad is struggling to emerge from all these politico-religious considerations. The highly dubious psychological analysis made by Sacher and explain it all just spoils the picture. The author could not prevent easy QLQ remarks and a thinly veiled irony prophecy of Muhammad, what I find unfortunate and especially useless. Finally, the book is in my opinion too monolithic and not sufficiently divided, hampering visibility (also know as printing of this edition is messy and ugly! A shame ...) Anyway, I still enjoyed reading an honest and critical work, and I learned a lot.