Okay first off I have no idea how they are making a movie out of this book, it is so short and nothing really happens. The writer makes everything happen with out any real tension or conflict it just happens, oh you need magic liquid to heal your brother, I'll just have Santa Claus give it to you. You need some way to save your brother from the evil witch okay I'll take his place on the sacraficail table, oh that means im going to die ah well i'll just make him come back to life. Dumb.
Also the one thing that was pounded into my head when I took some writing classes in college was that you can't switch points of view. In other words you can't go from telling the story from the main characters points of view and then suddenly talk to the reader. Sure you have to change view from each character in the book but to talk to the reader is just strange. Don't get this book, save your money and get something better. Like Eragon, Eldest, any of the Harry Potter books. What a waste of my money.