Blood Ransom by Sophie McKenzie

The sequel to Blood Ties. Now separated and living in homes thousands of miles away from each other, Theo and Rachel can only communicate over the internet and it just isn't the same. Then Rachel discovers that their old enemy, Elijah, is still working, and putting Daniel in danger in the process. She sets off to save the boy, but things don't go to plan. Meanwhile, Theo is finding reports saying that Rachel has killed herself. Unable to believe this news, he sets off to her home in Scotland to find out what really happened, but gets more than he bargained for.