Why someone's family wouldn't know her suddenly due to a change in the history as given is beyond me. The person who lived had nothing to do with her family. The person couldn't have- having died in the first history. I suppose they might have met and married someone in the modern person's family rather than the person who married that ancestor the first time, but since it is not clear what happened to that person in their life beyond 1912, it leaves a big question there. You are left thinking, wait, how did that happen? Also, several characters keep acting like Danny at least was back in their own histories, what sounds like some 20 or so years before this supposed first visit and discovery of the 'touchstone' and that is not explained Perhaps both issues are addressed in a later book. However, that story starts off with yet another apparent inconsistency- the 'touchstone' kept sending Danny and Rachel back exactly 100 years- then suddenly it doesn't- what changed that pattern of its function? Of course the whole time travel thing is imaginary, but still, it does seem like there ought to be some logic even in a world where time travel exists if triggered by some mechanism we simply just do not yet understand- it ought to follow some logical rules since generally the world of science and nature do, I think, with cause and effect that is generally consistent, not random. So, while I liked this book, other than those holes left in the story, and it was well-written and proofread, I am not sure I want to go any farther into the series.