The League of Frightened Men — Rex Stout

Nero Wolfe is the superlative detective of gargantuan girth. An no this orchid-growing genius of deduction, with the help of his trusted assistant, Archie Goodwin, must discover why two embers of The Harvard Club suddenly died and why a third member mysteriously disappeared. Suspected of their murders is a famous novelist whose bitter hatred of the victims has spanned twenty-five years. Others may soon die if Nero Wolfe can't read between the lines and slam the book on the cunning killer.