The book is almost nothing like the movie, more that just a few aspects were taken from it: it's not exactly an adaptation, and it shouldn't be surprising an original film can be better than a book (it's not even good to begin with). Similar with the Earthsea and Borrowers ones, except the former was generally agreed to be a mistake. I'd like there to be a better adaptation of Earthsea, none have really hit the mark so far imo.