The ages and time are confusing me.
She was over 300 years old when she died? Or has it been over 300 years since her death? But her family fell out of favor 300 years ago, so...
He spent 10 years preparing to travel back in time 17 years to his younger self, to when he's apparently 15, but looks younger then 10...
No way he could be referring to his age in the first couple of pages. If he was 15 there, then why would he turn back the clock 17 years, to before he was even born? Yeah, he probably said he was 5 but they tl'd it wrong. He's between 5 and 10. He's definitely not 15. Heck, he's only half the size of a tiny framed