If you haven't discovered Hiccup yet, you're missing out on one of the greatest inventions of modern children's literature
Pretty much everyone I know who has children adores these audiobooks and have listened to them on many a long (and otherwise fractious) car journey. Hiccup Horrendous Haddock III is a famous dragon trainer but he had to learn the hard way. Proper LOL funny as read by former Doctor Who David Tennant, you'll love listening to them too.
Quite simply, Cressida Cowell has an exceptional ability to give children what they like. Hiccup Horrendous Haddock III is a Viking who doesn't fit in: gawky and geeky, his adventures with his hunting-dragon Toothless are madcap and marvellous. Give it to a child, and see them become engrossed immediately.