In particular, it is not a French equivalent of Nesse and Williams, unfortunately not translated.
I read the Nesse and Williams easily, and several books on the theory of evolution Dawkins, Coyne, Gould example, again with great pleasure.
The author, know enyclopédique apparently, do not hesitate to sometimes go into the finer details of certain subjects, so much so that sometimes you do not even know what he's talking.
Furthermore, this book seems to be written rather quickly, as evidenced by typographical errors and repetitions that can be found here and there. Note that repetitions do not alter the book, so they are not very serious.
Several diagrams seem incomprehensible, but perhaps they are understandable to a doctor?
Finally, some chapters or passages seem to have nothing to do with the theory of evolution, and could well be drawn from books of medicine (cardiology, for example) is not calling "evolutionary" or "Darwinian". To be clear: the Darwinian perspective does not appear in these passages, even if the content is certainly interesting from a medical point of view.
That said I still put him four stars because I am bound to note, on the one hand and the book seems very serious, then I give him the benefit of the doubt, since I could not understand everything.
After all, it is not the author to suffer if I bought a book above my level.