Demelza loves science - she loves it so much that she's been known to stay up late to work on her peculiar inventions! But Demelza discovers she has inherited a distinctly un-scientific set of skills: Spectre Detecting. Like her grandmother, she can summon the ghosts of the dead. But when Grandma is kidnapped by a mysterious villain, she knows Spectre Detecting has something to do with it. Only Demelza and her pasty best friend, Percy, can solve the deadly mystery ...
