Ok, it is definitely not clear that he's already been back once--or 6x--at the beginning of the book. We get it that Robby is his older brother--and the Old Man.

We don't know who killed Jewel, how or in what timeline--what time it was in terms of how many times he'd gone back when she was killed. It appears that she dies in her ship chasing Tech. Is that why he has to go back again? Or is it to change their relationship? These things are not clear. Also, we don't know how Robby survived the invasion--I understand, I think, that Tech can survive b/c he can go back. Also, I don't see where it says anything that indicates it's the 7th time he's gone back.

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