Till the day I die 2

First off this is a sequel I am doing for Nobody2014 so before you read this one go and read book 1 first so you don't get confused.

After safely returning from outcast island minus a few injuries, they finally find a cure for Hiccup's sickness and life starts to go back to normal but Alvin wants revenge and isn't quite finished with Hiccup yet and still has a few more tricks up his sleeve.