Suspenseful fun and hilarious read! Could not put this book down and I did not see that twist I never saw coming. If you read book 3 who know that Alvin planted a little trap for dear Hiccup and his friends. Now Hiccup is on a quest to find the only cure which happens to be The-Vegetable-That-No-One-Dares-Name aka a Potato. But who has this cure? Well a Viking named Norbert the Nutjob. Now doesn’t that just sound like a friendly name. 4.5/5 Stars & “B+”.