One book failed to keep me interested, yesterday, and that was Rising Sun Victorious edited by Peter Tsouras. The individual authors postulate one or two minor changes in what happened in the history of the Pacific Theater in WWII, and then suggest the likely end results. I guess that these scenarios make me too uncomfortable to read on. In any case, no. That bodes poorly for my enjoyment of other books of the genre. I have to wonder why I like Turtledove's books so well, though. He does essentially the same thing.