Murder in E Minor — Robert Goldsborough

When a maestro is murdered, Archie is flabbergasted when the gargantuan gourmet detective lifts himself out of retirement, amid a juicy public scandal, Wolfe and Archie feast on suspects yet starved for facts, until the scanty clues finally arrange themselves like notes on a score, and Wolfe recognizes a dark melody that only a murder virtuoso could perform.