That is quite interesting; I deliberately went for diversity in that selection! It's a shame (in this context) that you have already read "As Used...", as it hit quite a few of the points you specified in your criteria. Still, I'm sure Naomi Klein will serve you well in that capacity!

Black Ajax is a good read; compiled from various documents and supposedly first hand accounts, lots of Regency slang provides flavour. Fraser does somewhat tip his hand on the extent to which it is fictionalised by including Harry Flashman's father in the narrative!