Bogdanov The problem is above all ego, at least as prominent as their chin. Without revisiting the controversy of their doctorate not worth much, this book is anything but scientific. Tangle of hypotheses, theories or layering of ideas: in the end, a well wobbly assemblage that does not hold water. The first half of the book is devoted to a trip through time from Paris (careful, they go back in time and have taken care to have an iPhone with them, you never know). Useless filler, also entertain a documentary broadcast on France 5 on Sunday afternoon. The second half explains their genius with this unbearable paternalistic tone of the discourse on "us, we are the ones who know you, poor beggars, do not try to understand, you are not able to."
Prefer Etienne Klein works, far more informative. For this one, flee.