I'm looking for one that is preferably not just a recount of his military exploits. If it comes as an audio book even better, long drive this weekend.
Go to the AMA about Waterloo which is on the front page atm. A couple of experts have given a list.
Read The Age of Napoleon by J Christopher Herold. You can get it new and used from Amazon for 1 penny. Its a good book, one that grabs your attention and reads smoothly.
Indeed, I am leading the Waterloo AMA, Andrew Roberts Napoleon: A Life is the best if a bit overly in favor of Napoleon.