Another very interesting book is, if you are interested in the Peninsular War:
"La Corogne-Les Aigles en Galice" de N. Griffon de Pleineville (ed. Le Livre Chez Vous, in French, 609 pages; I don't know if an English edition is avalaible).
A complete description of the organisation of the British and French Armies, the political background, the fighting retreat of Sir J.Moore and the battle of Corunna, with very detailed OOBs (the French OOB of Corunna battle is the most detailed and complete I've ever seen) with lot of very high quality illustrations, very good maps and photos of battlefields at present days (for instance Sahagun, Benavente, Cacabelos, Corunna). The book is interesting because it's the first extensive one by a French author!!! A bit expensive, but according of me it' a must!
Bye
EylauHurricane