- Author Existence Failure: The novel was Rex Stout's final Wolfe novel before his death at the age of 88 (a collection of unpublished short stories in the series was subsequently published after his death).
- Creator Breakdown: The novel was written after the Watergate scandal had broken and President Richard Nixon's resignation. Let us simply say that Stout was not happy about what happened and Nixon was not on Stout's Christmas card list.
- Unintentional Period Piece: Many of the novels refer to events around when they were published, but this novel is explicitly set in the months immediately after Nixon's resignation and features numerous references to the scandal and the key participants (such as John Mitchell, H.R. Haldeman, John Ehrlichman, etc.).
Trivia / A Family Affair