The castle mystery

"Meet Jenny Starling: travelling cook and reluctant amateur detective. Jenny Starling has her dream job cooking for Lord and Lady Avonsleigh in a genuine castle. Then one of the castle's treasures, a fabulously jewelled dagger, is used to murder a staff member. The victim is found stabbed through the heart in the conservatory. Lady Avonsleigh insists that Jenny help the police find the murderer. But how can Jenny solve this case when the mur...