A Family Affair
Rex Stout
 A waiter at Rusterman's Restaurant turns up at Wolfe's front door late one night, claiming that a man is going to kill him. Shortly after Archie puts him in one of the spare bedrooms, the waiter dies when a bomb planted in his coat pocket explodes. Wolfe, outraged at the thought of such a violent act taking place in his own house, resolves to find the murderer without sharing any information with Inspector Cramer. Soon Wolfe and Archie find themselves investigating two additional murders: the earlier killing of a customer at Rusterman's, and the subsequent death of the waiter's daughter. For much of the story, Stout leads the reader to believe that the central murder mystery is related to the Watergate scandal. Ultimately, Wolfe discovers that the killer is one of his closest associates, a character who had been appearing in Nero Wolfe mysteries for over forty years. A Family Affair is an unusual Nero Wolfe mystery in that Archie reveals his (correct) opinion of the killer's identity well before Wolfe does so in the closing chapters.