The Leavenworth Case - Anna Katharine Green

When the retired merchant Horatio Leavenworth is found shot dead in his mansion library, suspicion falls on his nieces, Mary and Eleanore, who stand to inherit his vast fortune. Their lawyer, Everett Raymond, infatuated with one of the sisters, is determined that the official investigator, detective Ebenezer Gryce, widens the inquiry to less obvious suspects.