it is seemingly fashionable to bash Coppens. I cannot see any visceral hatred but just a sound impartial analysation of history - a model of research.
Even Béraud, who is quite pro Napoléon regards his work as imperative.
Without it you won't understand the battle of the 18th June 1815.
Actually - in my view, the best works about this campaigns are written by Belgian and Dutch authors.