This book is written by Cressida Cowell. The heros of this story are Hiccup and his dragon Toothless. Hiccup* is at viking school in a herding reindeer on dragonback lesson when he noticed that a Rogue dragon had burnt the whole hillside. They found out what was happening (I won't tel you but it was something bad). After the thing (a viking meeting) Hiccup, Camicazi and Fishlegs went of on there quest. (Find out if they by reading the book).
I'm loving this book, it's terrific. This series of books are the best I have ever read !!!
Here is a link to Cressida Cowell website
* If you haven't discovered Hiccup yet read the books and " How to Train your dragon" , " How to be a Pirate " and " How to speak dragonese " Post