D
Dorothy L. Sayers
An English crime writer, poet, playwright, essayist, translator and Christian humanist.
The documents in the case
A man is found dead in a shack, a dish of poisonous mushrooms by his side. The victim, an expert on fungi, seemingly consumed a lethal dose of muscarine. London's best minds are baffled by the brilliant murderer, but the key to solving the case lies hidden in a series of overlooked letters and documents. Only the dead man's son seems to understand their importance.