The Oxford Bookworms Library provides superb reading and student / teacher support for the classroom, and is also highly recommended for schools running Extensive Reading Programmes, offering the right range of books that encourage students to read for pleasure. 'I don't know that you have done anything wrong', Miss Hepplewhite said. 'But it is possible that you have done something rather dangerous'. William and Susie thought they were just playing a game when they cooked a witch's brew in the old barn and said a spell over it, but Martha was not so sure. And indeed, the three friends soon learn that they have called up something dark and evil out of the distant past...