There's just A LOT of data in there. I've only quickly flicked through it, but have already seen much Useful stuff. Explanations on arts and formations are particularly nice.

Oh there's an interview in the back, with the producers. I need my dictionary to help me understand it thoroughly, but it seems like they said there is no proper explanation to Wagram's history and gamers are welcomed to understand it however they want! (Personally I see that as a cop-out, that they just couldn't be bothered to write him a story, but well...)