You should read this. It will interest you as an artist, but it's also full of contemporaneous detail that's relevant to the Captain Alatriste series. There ought to be another of those out soon. They're obviously Perez-Reverte's retirement-fund books, and Alatriste and the gormless Inigo need to be heading off to Mexico.
A quick search reveals nothing new in the library, but I requested "Cabo Trafalgar" in Spanish, just for the Learning Experience. Amazon has a new Alatriste novel, "El Puente de Los Asesinos," the Bridge of the Assassins, but only in Spanish so far.