A whiff of cyanide - Guy Fraser-Sampson

The third volume of the Hampstead Murders sees the team become involved with a suspicious death at a crime writers' convention. Is this the result of a bitterly contested election for the Chair of the Crime Writers' Association or are even darker forces at work? Peter Collins, who is attending the convention as the author of new book on poisoning in Golden Age fiction, worries that the key clue to unlock this puzzle may be buried within his own memories. A character called Miss Marple offers her advice, but how should the police receive this? Meanwhile an act of sudden, shocking violence and a dramatic revelation threaten tragic consequences.