I read this book about 20-Jul-2015. This is the first time I've read this book. The book is copyright 1990. This note was last modified Tuesday, 28-Jul-2015 21:05:31 PDT.
This is book 5 of the "Nero Wolfe Continuation" series.
This note does not contain major spoilers for the book.
Wolfe and Archie dive into a case of industrial espionage involving a small plucky ad agency being relentlessly stolen from by a large established ad agency. The product appears to be a cherry cola, and one of the brands is using a name playing off "Cherokee" (and giving lots of profits to the tribes).
This one, as I vaguely recall, is rather clumsy.