I really don't know what to think about this book. It is utterly confusing, I was feeling totally stupid and inattentive while reading the story because I understood so little of what is going on. I kind of liked the story anyway but the way it was presented... oh and now that I read in some reviews that the mathematics presented in the book is just another word for "magic spell", this makes the book a tiny bit easier to understand. Still, I'm utterly confused about this book.