The Man in the Brown Suit

The Secret of Chimneys

The Seven Dials Mystery

The Mysterious Mr. Quin 

The Sittaford Mystery 

The Hound of Death

The Listerdale Mystery 

Why Didn’t They Ask Evans？

Parker Pyne Investigates

Murder Is Easy

And then there Were None

Towards Zero

Death Comes as the End

Sparkling Cyanide

Crooked House

They Came To Baghdad

Destination Unknown

Spider's Web

The Unexpected Guest

Ordeal by Innocence

The Pale Horse

Endless Night

Passenger to Frankfurt

Problem at Pollensa Bay

While the Light Lasts

poirot:

The Mysterious Affair at Styles
Murder on the Links

Poirot Investigates
The Murder of Roger Ackroyd
The Big Four
The Mystery of the Blue Train
Peril at End House
Lord Edgware Dies

Murder on the Orient Express

Three-Act Tragedy
Death in the Clouds

The ABC Murders
Murder in Mesopotamia
Cards on the Table
Dumb Witness
Murder in the Mews

Death on the Nile
Appointment with Death
Hercule Poirot's Christmas
Sad Cypress
One, Two, Buckle My Shoe

Evil Under the Sun
Five Little Pigs

The Hollow 
The Labours of Hercules
Taken at the Flood

Mrs. McGinty's Dead
After the Funeral
Hickory Dickory Dock

Dead Man's Folly
Cat Among the Pigeons
The Clocks
Third Girl
Hallowe'en Party
Elephants Can Remember

Poirot's Early Cases
Curtain: Poirot's Last Case

Marple:

The Murder at the Vicarage
The Body in the Library
The Moving Finger
A Murder Is Announced

They Do It with Mirrors

A Pocket Full of Rye
4.50 from Paddington

The Mirror Crack'd from Side to side

A Caribbean Mystery 
At Bertram's Hotel
Nemesis
Sleeping Murder
The Thirteen Problems
Miss Marple's Final Cases

Tommy & Tuppence:

The Secret Adversary

Partners in Crime
N or M?
By the Pricking of My Thumbs

Postern of Fate

Published as Mary Westmacott:

Giant's Bread 
Unfinished Portrait

Absent in the Spring

The Rose and the Yew Tree

A Daughter's a Daughter 
The Burden

Memoirs:

An Autobiography

Come,Tell Me How You Live

Play Collections:

The Mousetrap and Selected Plays

Witness for the Prosecution and Selected Plays