Mark called up to the boy who stood on top of a ruined fragment of castle wall. The boy was more than a dozen feet above the ground and swayed. The October breeze made Mark even colder in his Halloween costume. Shivers ran up his back. The boy¹s head slowly turned and he looked down, fixing his pale blue eyes on Mark¹s face. He said something. It sounded foreign. Then Mark understood the truth, and he was terrified....