Review for Lich
This is a pretty heavy on the exposition. The reader is just supposed to take Harry's word and everyone's reactions at face value, I take it.
There are a number of questions: Why would Harry's friends be so rotten to him that he wouldn't regret abandoning them. Is he incapable of forgiveness now that his inner Harry is stuck in a psychic pebble somewhere?
Also, why would the Yuan-ti bother to teach Harry magic? Wouldn't they consider that he'd be mad at them for lichifying him?