The Kentish Manor Murders

The Kentish Manor Murders is a 1988 mystery detective novel by the British writer Julian Symons. A pastiche of the traditional Sherlock Holmes stories by Arthur Conan Doyle, it is a sequel to the 1975 novel A Three-Pipe Problem.

Plot
Sheridan Haynes, now famous for playing Holmes in a series of television adaptations, is invited to Castle Baskerville by Warren Waymark to perform some scenes in character. The eccentric millionaire Waymark, a fanatical Sherlockian, is a collector of anything related to the detective. Before his visit, Haynes is approached by a man claiming to have a genuine copy of previously unknown original Doyle story which he wants to sell to Waymark.