The review in the Times Literary Supplement began, "This is a well-written detective story of which the only criticism might perhaps be that there are too many curious incidents not really connected with the crime which have to be elucidated before the true criminal can be discovered". The review concluded, "It is all very puzzling, but the great Hercule Poirot, a retired Belgian detective, solves the mystery. It may safely be asserted that very few readers will do so."[10]
A long review in The New York Times Book Review, read in part:
There are doubtless many detective stories more exciting and blood-curdling than The Murder of Roger Ackroyd, but this reviewer has recently read very few which provide greater analytical stimulation. This story, though it is inferior to them at their best, is in the tradition of Poe's analytical tales and the Sherlock Holmes stories. The author does not devote her talents to the creation of thrills and shocks, but to the orderly solution of a single murder, conventional at that, instead.... Miss Christie is not only an expert technician and a remarkably good story-teller, but she knows, as well, just the right number of hints to offer as to the real murderer. In the present case his identity is made all the more baffling through the author's technical cleverness in selecting the part he is to play in the story; and yet her non-committal characterization of him makes it a perfectly fair procedure. The experienced reader will probably spot him, but it is safe to say that he will often have his doubts as the story unfolds itself.[11]
The Observer had high praise for the novel, especially the character Caroline:
No one is more adroit than Miss Christie in the manipulation of false clues and irrelevances and red herrings; and The Murder of Roger Ackroyd makes breathless reading from first to the unexpected last. It is unfortunate that in two important points – the nature of the solution and the use of the telephone – Miss Christie has been anticipated by another recent novel: the truth is that this particular field is getting so well ploughed that it is hard to find a virgin patch anywhere. But Miss Christie's story is distinguished from most of its class by its coherence, its reasonableness, and the fact that the characters live and move and have their being: the gossip-loving Caroline would be an acquisition to any novel.[4]
The Scotsman found the plot to be clever and original:
When in the last dozen pages of Miss Christie's detective novel, the answer comes to the question, "Who killed Roger Ackroyd?" the reader will feel that he has been fairly, or unfairly, sold up. Up till then he has been kept balancing in his mind from chapter to chapter the probabilities for or against the eight or nine persons at whom suspicion points.... Everybody in the story appears to have a secret of his or her own hidden up the sleeve, the production of which is imperative in fitting into place the pieces in the jigsaw puzzle; and in the end it turns out that the Doctor himself is responsible for the largest bit of reticence. The tale may be recommended as one of the cleverest and most original of its kind.[5]
Howard Haycraft,[14] in his 1941 work, Murder for Pleasure, included the novel in his "cornerstones" list of the most influential crime novels ever written.[13]
The English crime writer and critic Robert Barnard, in A Talent to Deceive: An appreciation of Agatha Christie, wrote that this novel is "Apart—and it is an enormous 'apart'—from the sensational solution, this is a fairly conventional Christie." He concluded that this is "A classic, but there are some better [novels by] Christie."[6]
John Goddard wrote an analysis of whether Christie 'cheats' with her sensational solution and concluded that the charge of cheating fails.[12]
In a biography of Christie, Laura Thompson wrote that this is the ultimate detective novel:
The Murder of Roger Ackroyd is the supreme, the ultimate detective novel. It rests upon the most elegant of all twists, the narrator who is revealed to be the murderer. This twist is not merely a function of plot: it puts the whole concept of detective fiction on an armature and sculpts it into a dazzling new shape. It was not an entirely new idea ... nor was it entirely her own idea ... but here, she realised, was an idea worth having. And only she could have pulled it off so completely. Only she had the requisite control, the willingness to absent herself from the authorial scene and let her plot shine clear.[15]: 155–156
In 1944–1946, the American literary critic Edmund Wilson attacked the entire mystery genre in a set of three columns in The New Yorker. The second, in the 20 January 1945 issue, was titled "Who Cares Who Killed Roger Ackroyd?", though he does no analysis of the novel. He dislikes mystery stories altogether, and chose the famous novel as the title of his piece.[16][17]
In 1990, The Murder of Roger Ackroyd came in at fifth place in The Top 100 Crime Novels of All Time, a ranking by the members (all crime writers) of the Crime Writers' Association in Britain.[8] A similar ranking was made in 1995 by the Mystery Writers of America, putting this novel in twelfth place.[9]
Literature professor and author Pierre Bayard, in the 1998 work Qui a tué Roger Ackroyd? (Who Killed Roger Ackroyd?), re-investigates Agatha Christie's Ackroyd, proposing an alternative solution in another crime novel. He argues in favour of a different murderer – Sheppard's sister, Caroline – and says Christie subconsciously knew who the real culprit is.[18][19]
In 1999 the novel was included in Le Monde's 100 Books of the Century published in the French newspaper Le Monde, chosen by readers from a list of 200.[20]
In 2013, the Crime Writers' Association voted this novel as CWA Best Ever Novel.[7] The 600 members of CWA said it was "the finest example of the genre ever penned." It is a cornerstone of crime fiction, which "contains one of the most celebrated plot twists in crime writing history."[7][21] The poll taken on the 60th anniversary of CWA also honoured Agatha Christie as the best crime novel author ever.[7][21]
In the "Binge!" article of Entertainment Weekly Issue #1343–44 (26 December 2014 – 3 January 2015), the writers picked The Murder of Roger Ackroyd as an "EW and Christie favorite" on the list of the "Nine Great Christie Novels".[22]
The character of Caroline Sheppard was later acknowledged by Christie as a possible precursor to her famous detective Miss Marple.[23]: 433
