Hiccup, Toothless, and the rest of the dragon riders encounter two deadly yet mysteriously linked threats: One is an island consumed by Dragonvine, an uncontrollable force of nature that's poisonous to humans and deadly to dragons. The other is an all-new, all-terrifying dragon species - the web-spitting Silkspanners!
About the book
Hiccup, Toothless, and the rest of the dragon riders encounter two deadly yet mysteriously linked threats: One is an island consumed by Dragonvine, an uncontrollable force of nature that's poisonous to humans and deadly to dragons. The other is an all-new, all-terrifying dragon species - the web-spitting Silkspanners!