Columbia subject headings:
Harvard subject headings:
Conspiracies--Fiction
Criminal psychology--Fiction.
Edinburgh (Scotland)--Fiction.
Holmes, Mycroft (Fictitious character)--Fiction.
Holmes, Sherlock--Fiction.
Palace of Holyroodhouse (Edinburgh, Scotland)--Fiction.
Private investigators--England--Fiction
Private investigators--Fiction
Riccio, David, 1533?-1566--Assassination--Fiction.
Victoria, Queen of Great Britain, 1819-1901--Fiction.
Watson, John H. (Fictitious character)--Fiction.
Princeton subject headings:
Criminal psychology--Fiction.
Fiction.
Holmes, Sherlock (Fictitious character)--Fiction.