Not too many this time...
On Page 13:
It was stupid, pointless, irritating beyond belief that he still had four days left of being unable to perform magic...but he had to admit to himself that this jagged cut on his finger would have defeated him.
Is it just me, or does this loooong sentence not really make any sense?
On Page 14:
It was a two inch long fragment of the enchanted mirror that his dead godfather Sirius had given him.
Umm...harsh much? I'm sure there'd be a much nicer way of reminding the readers about Harry's late Godfather.
[There are some gramatical errors in here that I'm not addressing anymore. If you've read it, I'm sure you've picked up on it too.]