The Great Poirot Reading Challenge

It's long been a goal of mine to finish reading all of Agatha Christie's Poirot books. I'm not going to read the short stories, as short stories aren't really my thing. Here's how I *think* I'm doing so far. It's hard to remember which ones I've read and which I haven't . . .

 The Mysterious Affair at Styles 1920 - READ
 Murder on the Links 1923
 Christmas Adventure (short story) 1923
 Poirot Investigates (short stories) 1924
 Poirot's Early Cases (short stories) 1974
 The Murder of Roger Ackroyd 1926 - READ
 The Big Four 1927 - READ
 The Mystery of the Blue Train 1928 - READ
 Black Coffee (play novelisation by Charles Osborne) 1997 - READ
 Peril at End House 1932 - READ
 The Mystery of the Baghdad Chest (short story) 1932
 Second Gong (short story) 1932
 Lord Edgware Dies 1933 - READ
 Murder on the Orient Express 1934 - READ
 Three Act Tragedy 1935
 Death in the Clouds 1935 - READ
 The ABC Murders 1936 - READ
 Murder in Mesopotamia 1936 - READ
 Cards on the Table 1936
 Yellow Iris (short story) 1937
 Murder in the Mews (four novellas) 1937 - READ
 Dumb Witness 1937
 Death on the Nile 1937 - READ
 Appointment with Death 1938
 Hercule Poirot's Christmas 1938 - READ
 Sad Cypress 1940
 One, Two Buckle my Shoe 1940
 Evil Under the Sun 1941 - READ
 Five Little Pigs 1943
 The Hollow 1946
 The Labours of Hercules (short stories) 1947
 Taken at the Flood 1948
 Mrs McGinty's Dead 1952
 After the Funeral 1953 - READ
 Hickory Dickory Dock 1955
 Dead Man's Folly 1956
 Cat Among the Pigeons 1959
 The Adventure of the Christmas Pudding (short stories) 1960 not published in the USA
 The Clocks 1963
 Third Girl 1966 - READ
 Hallowe'en Party 1969 - READ
 Elephants Can Remember 1972 - READ
 Curtain: Poirot’s Last Case 1975 - READ