In September 2021, I read:
Home Sweet Homicide (1944) by Craig Rice
He Who Whispers, 1946 (Dr Gideon Fell # 16) by John Dickson Carr
The Witness for the Prosecution and Other Stories (collected 1948) by Agatha Christie
The Sittaford Mystery AKA The Murder at Hazelmoor (1931), by Agatha Christie
The Hound of Death and Other Stories (collected 1933) by Agatha Christie
The Listerdale Mystery (collected 1934) by Agatha Christie
The Thirteen Problems: Miss Marple (collected 1932) by Agatha Christie
The Regatta Mystery And Other Stories (collected 1939) by Agatha Christie
Three Blind Mice and Other Stories (collected 1950) by Agatha Christie
A Crime is Afoot 