Just picked up "Waterloo; The History of Four Days, Three Armies and Three Battles" by Bernard Cornwell.
http://www.bernardcornwell.net/books/waterloo-the-true-story-of-four-days-three-armies-and-three-battles/ . After writing a lot of fictional stories set during this time period and some featuring the battle, Mr. Cornwell writes his first non-fiction book about the pivotal battle.
I have just read the back cover and the introduction but am really looking forward to this novel. I have read almost all of his book and loved them (his version of the Arthurian legend is my favourite) so I have high expectations for this book and am hoping it lives up to them.