Who could murder staff member at Buckingham Palace?

Buckingham Palace

Quiz of the day

Mysteriously killing of one of staff member of Buckingham Palace ignited confusion and insecurity, no one could believe that murder could take place inside royal palace of Queen Elizabeth II. Reporting the news of murder, British Police reached into the crime scene to begin their investigation. Upon seeing dead body lying near the swimming pool, investigators begin to gather finger prints and other evidence on crime scene. Rozie was said to be the most sincere and honest assistant whom Her Majesty, Queen Elizabeth II relied. Suspicion also had couldn't be ruled out on the three dogs stationed at Royal Palace by murder investigators so their movement too came under scrutiny. The fear spread among the staff of Buckingham Palace when Rozie received the threatening letter from unknown sender. Seeing the unpredictable situation, Queen Elizabeth II decides to resolve the mystery to look into this matter by herself at the royal palace.

So readers, can you guess the name of aforementioned review, from which book it has taken of? As a hint, this mysterious murder thriller suspense book written by author S.J.Bennett Janey. If you knew the answer than don't do nothing, just keep quiet, let the other readers of readers blog think the possible answer but on the contrary if you don't know the answer of this asked quiz than may ask us in the comments.