There are libraries groaning with excellent histories of France, far longer and intimidatingly more thorough than mine. In the hope that my little book has piqued your interest, however, I simply want to draw your attention to a handful that I have particularly enjoyed over the years, in case you would like to read more.
De Bello Gallico by Julius Caesar (editions too numerous to count)
Paris and Elsewhere by Richard Cobb (John Murray, 1998)
The History of Modern France by Jonathan Fenby (Simon & Schuster, 2015)
The Discovery of France by Graham Robb (Picador, 2007)
Napoleon the Great by Andrew Roberts (Penguin, 2014)
The History of the Crusades, vols 1–3, by Stephen Runciman (Penguin, 1971 etc.)
François I: Prince of the Renaissance by Desmond Seward (Legend, 1973)
And, on a rather lighter note, I did much enjoy this very entertaining romp through a millennium of misunderstandings: 1000 Years of Annoying the French by Stephen Clarke (Bantam Press, 2010).