In his fourth sidesplitting adventure, Hiccup Horrendous Haddock III must rescue his best friend, Fishlegs, from the deadly disease Vorpentitis. The only cure is rare and almost impossible to find: a potato. But where will Hiccup find such a thing? He'll have to dodge the terrible Sharkworms, battle Doomfangs, and outwit crazy Hooligans if he's going to be a hero ... again.
A fast paced plot, slapstick humor, and witty dialogue enhance this exciting tale.