How to Train Your Dragon Dragonvine

"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!"