• ✔ The Mysterious Affair at Styles (1921)
• ✔ The Murder on the Links (1923)
• ✔ The Murder of Roger Ackroyd (1926)
• ✔ The Big Four (1927)
• The Mystery of the Blue Train (1928)
• The Murder at the Vicarage (1930)
• ✔ Peril at End House (1932)
• Lord Edgware Dies/Thirteen at Dinner (1933)
• ✔ Murder on the Orient Express (1934)
• The A.B.C. Murders (1936)
• Murder in Mesopotamia (1936)
• Death on the Nile (1937)
• Hercule Poirot's Christmas (1938)
• ✔ And Then There Were None (1939)
• N or M? (1941)
• The Body in the Library (1942)
• Five Little Pigs (1942)
• Towards Zero (1944)
• ✔ Sparkling Cyanide (1945)
• The Hollow (1946)
• ✔ Crooked House (1949)
• A Murder Is Announced (1950)
• ✔ Three Blind Mice and Other Stories (1950)
• Ordeal by Innocence (1958)
• The Clocks (1963)
• By the Pricking of My Thumbs (1968)
• Hallowe'en Party (1969)
• Elephants Can Remember (1972)

LIDOS = 10