Arrowhead by Ruth Eastham
When thirteen-year-old Jack moves to Norway, he's sure there's no truth in the local myths and legends. But then he comes face to face with one: the body of a Norse warrior boy, frozen in the ice, and carrying with him an ancient arrowhead - that contains a terrible curse. If Jack's going to survive, he has to overcome both an ancient wrong and a newly-risen enemy in this thrilling adventure from an award-winning author.