Publisher's Synopsis
The adventures continue for the New York Times bestselling How to Train Your Dragon series!
The dragon rebellion has begun, bringing the Vikings' darkest hour upon them. Hiccup has become an outcast, but that won't stop him from going on the most harrowing and important quest of his life. He must find the dragon's jewel in order to save his people ... but where should he begin?
Don't miss Hiccup's most dangerous adventure yet!
