This was a fantastic book, with a very different view of time travel.  I understand the guy’s first and second replays, as I would have done much the same.  I don’t understand the later lives, as I would have seen what I could learn, and then progressed the world at a faster rate, made bigger changes, and been a powerful figure.  I also found it interesting that the original timeline was the one they returned to, instead of any of the alternates they had created.  I have to admit that I didn’t expect the way it ended.

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