I have not seen this one mentioned - French but there is a good English translated version. "60 days that Shook the West" by J Benoist-Mechin. A bit wobbly on the fighting but Benoist-Mechin was a politician and eventually joined the Vichy Government. Consequently the book is excellent on detail of the in-fighting in the French Government, Weygand, de Gaulle and Petain et al. I found it very readable and fascinating. Benoist-Mechin narrowly avoided execution after the War as a traitor and remains so for many French people today. Also "Why France Collapsed" Guy Chapman - not bad and very good with info on the last two days of Dunkirk when the French fought on alone.