This is book 4 of the "Nero Wolfe Continuation" series.

This note does not contain major spoilers for the book.

Continuations of the classic Nero Wolfe series by the non-classic Robert Goldsborough.

In this case, Lilly's niece is date-raped by a guy (bizarre to watch Archie, who we have watched pursue women in the 1930s, taking date rape seriously), who shortly comes to a bad end. Maybe her mother, or her father (divorced), or Archie, or her brother, or the guy who thinks he's in love with her, or somebody, murdered him.

Not sure what Goldsborough's problem with vocabulary is. Somehow, the stock piece of Wolfe and Archie playing with words always goes awry for him. It almost feels like he thinks the words Stout picked for that were truly obscure, rather than at a very carefully chosen distance down the probability distribution.