Probably Vincent Cronin, Napoleon: An Intimate Biography, despite the opinions of some, it's very readable (Cronin was the son of novelist A.J. Cronin) and focusses largely on non-Military matters.
Cronin says in his preface: "There are in existence a large number of Lives of Napoleon and, though it will sound presumptuous, I was dissatisfied with their picture of Napoleon. I could not find a living, breathing man. Always to my mind there were glaring contradictions of character. To take one example from many, biographers repeat Napoleon's phrase: "Friendship is only a word. I love no man." But at the same time it was obvious from their own pages that Napoleon had many close friends, more I reckon than any ruler of France, and that he was as fond of them as they were of him. Many of the biographers were evidently embarrassed by this seeming contradiction, and they tried to explain it by saying that Napoleon was different from other men: "Napoleon was a monster of egoism," or "Napoleon was a monster of insincerity." I for one do not believe in monsters."