In 1983, Octopus Books published an untitled omnibus edition of four Agatha Christie's novels. The book was released on behalf of Marks and Spencer under the St Michael tradename. Available in hardcover only, the book comprised the novels: The Murder of Roger Ackroyd, The Mystery of the Blue Train, Dumb Witness and Death on the Nile. The omnibus itself did not have a unique title and only listed the titles of the 4 component novels on its cover and on the title page. Various sources also attest that another version, with the same content and cover was released by Peerage Books in 1984 (Worldcat: 50791953 . The ISBN for this version is uncertain. Both 9782830215113 and 9781850520085 have been seen.
Blurb on front flap[]
AGATHA CHRISTIE
THE MURDER OF ROGER ACKROYD is one of Agatha Christie's most ingenious murder mysteries. Narrated by the local doctor, who is called in to examine Roger Ackroyd's body, the story unfolds with growing suspense that lasts right up to the very last page.
THE MYSTERY OF THE BLUE TRAIN. Murder was an unexpected fellow passenger with the rich and beautiful elite, as they travelled to the glittering French Riviera of the 1920s.
DUMB WITNESS. Hercule Poirot had embarked on one of his most intriguing investigations when he received a letter from a murder victim--written two months after her death.
DEATH ON THE NILE. Most of the passengers on the Nile steamer had a motive to kill Linnet Doyle. One of them was desperate enough to do it--but which one?
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