Rebecca helpfully points out this site which is all about alternate histories. Like her, the only sci-fi I really enjoy is of this type. A book I read in this vein a long time ago, and which I would like to read again, is The Probability Broach, by L. Neil Smith. I’m not sure if it’s considered a good book, but I enjoyed the revisiting of American revolutionary history. Oh, and the gorillas, too. Funny that it’s considered “the definitive libertarian novel.” But I guess libertarians are all about alternate histories…