How to train your dragon - book and film shock

How to train your dragon is a good series of books for boys and girls between 9 and 12. however, when the film came out it really annoyed me because it is completely different to the books. new characters are introduced and characters personalities are flipped. the only common thing is the basic plot, and the main character; Hiccup.

It is the same with the Tv series, although good, it is a complete con of the book. So if you have read the books and are about to watch the film/TV series, or vis versa, you'll be in for a shock!