The tenth book in the How to Train Your Dragon series.
When we last left Hiccup things were getting very dark indeed. The Dragon Rebellion has begun. Snotlout is the new Chief of the Hooligan Tribe. Stoick has been banished and given the Slavemark.
And Alvin the Treacherous has EIGHT of the King's Lost Things, and has been proclaimed the new King of the Wilderwest ... But what can Hiccup do, now all alone and in exile, hunted by both humans and dragons? Can he find the Dragon Jewel, mankind's last and only hope and become the Hero once again?