If you're yay for war books, I'd reccomend Black Hawk Down: A Story of Modern War, by Mark Bowden. Not because it's BHD, but because it's really gripping and gives a good detailed, minute by minute account of battle, and what led up to and came after it. My biggest criticism would probably be the lesser accounts from the Somali people's point of view, but it's there (and much much more of it that we saw in the movie, of course).