It is! (It even has almost all 5 star reviews on Amazon.) It's written/translated in a very academic style and there are times when I have to consciously focus to get a sentence, but it's also pretty clear: here is a misconception, here are multiple examples disproving it. I think the most difficult thing for me is that I don't know a lot of the French historical figures, and I definitely don't know the order of the kings, so I have to pay a lot more attention to the specific dates given.