The End of Andrew Harrison

The End of Andrew Harrison is a 1938 detective novel by Freeman Wills Crofts. It is the seventeenth in his series of novels featuring Inspector French, a Scotland Yard detective of the Golden Age known for his methodical technique. The title character closely resembles Sigsbee Manderson, the murder victim of E.C. Bentley's celebrated 1913 novel Trent's Last Case.

Synopsis
Few are prepared to shed a tear about the death of the ruthless financier Andrew Harrison aboard his houseboat at Henley. However the initial conclusion of suicide fails to convince French, who investigates and searches for the hidden link for what he believes is a case of murder.