Dark Spell by Gill Arbuthnott - 15-year-old Callie is a witch. Sometimes her mind seems to make things happen, things she can't control. She can set fire to things without a match, and when she's angry people can get hurt. Josh knows she's a bit weird, but its only on a dark and dangerous visit to the tunnels under the ruins of St Andrews' Castle that he realises just how strange she really is. Something comes back with Callie - in Callie, something she can't escape.