Demelza loves science - she loves it so much that she stays up late to work on her inventions. But she soon discovers she's also inherited a distinctly unscientific skill: Spectre Detecting. Like her grandmother, she can summon the ghosts of the dead. When Grandma Maeve is kidnapped, Demelza and her pasty-faced best friend, Percy, must leap into action to solve the deadly mystery ...
