I knew Joanne Harris wouldn't let me down! The story is nice, has a female teenager protagonist, it´s packed with action and seemingly straightforward and simple, with a low count of pages, and also a low count on characters, as a "Young Adult" book should be. But those were all the concessions the author made in order to market this story to the aforementioned Young Adults. Behind the cosy exterior, this is a finely crafted mystery. It´s a little short, sure, but it's worth reading, specially if you like the Norse mythology.