This is one of my top three favorite Rex Stout Nero Wolfe mysteries! Plot about a murder brought about by eating poisoned chocolates (later, poisoned aspirins), and due to the circumstances, motive is terribly difficult to determine because it's not certain the victim was the intended victim. Very non-cooperative characters - maddeningly so, sprinkled with those telling partial truths and withholding helpful information. The most difficult of clients ever, and the mystery so difficult one fears Wolfe won't pull off another miraculous solution. Many red herrings and twists and turns, very hard to figure out how it's going to turn out. Wolfe, Archie, Fritz, Cramer in their usual entertaining forms; excellent story, enjoyable! If you haven't already read this one, treat yourself to it!