Wilma Tenderfoot: the case of the fatal phantom

Wilma Tenderfoot and her trusty beagle Pickle face their toughest task yet. A mummified body has been found buried in the grounds of gothic mansion Blackheart Hoo. Who is it? How did they die? And why is the mummy clutching a key? As things take a seriously spooky turn Wilma must solve the puzzle quickly.