Lorna Nicholl Morgan was an English writer who published four mystery novels in the 1940s. Her work has been compared to that of Margery Allingham and Dorothy Sayers.

Lorna Nicholl Morgan was born in New Malden, London, on 20 August 1913, the youngest of five sisters. Her father worked as a legal draftsman. In 1954, at the age of 41, she emigrated to the United States, leaving her previous home in London to sail unaccompanied on the S.S. Ryndam from Southampton to New York. On the ship's passenger list, she was described as a novelist.

Morgan was the author of four mystery novels:
Murder in Devils' Hollow (1944, World's Work)
Talking of Murder (1945, Harrap)
The Death Box (1946, Macdonald & Co.)
Another Little Murder (1947, Macdonald & Co.)

According to Social Security records, she died on 15 November 1993.

During December 2014, British booksellers reported a resurgence of interest in novels from the Golden Age of Detective Fiction, attributed to the British Library's successful reprinting of Mystery in White by Joseph Jefferson Farjeon. More Christmas-themed murder mysteries from the Golden Age were reprinted over the following years, including Morgan's Another Little Murder, which was rechristened Another Little Christmas Murder by its new publishers, Sphere Books, to emphasise its festive setting. Under this title, the book has received mixed reviews, with some readers criticising its link to Christmas as tenuous, and others enjoying its "intricately plotted" nature and describing it as a "classic".

Either way, the commercial performance of Another Little Christmas Murder was such that the publishers decided to reprint The Death Box less than a year later, advertising the fact that it was from the same author on the front cover.