
We are in the second half of the year, and I continue to pursue the Read Christie Challenge for 2026. This seems like an apt description for it this month, as the characters in my chosen book for July are precisely that: pursued. And, more specifically, pursued by a completely unknown psychopathic murderer, who has no intention of stopping until every single person is dead.
The book I am talking about is probably one of the most iconic Agatha Christie novels of all: And Then There Were None. The story takes place on an island off the coast of Devon, England, where a group of seemingly disparate people have gathered at the invitation of the mysterious U.N. Owen, who has bought the island. Each one of these individuals has been invited via letter supposedly from an employment agency, or a friend, acquaintance, and so forth. Taken to the island via ferry, they are left to their own devices, together with a married couple who have recently been employed as staff to accommodate the party. But something unites these people: On the first evening, when everyone is gathered, a record begins to play on a hidden gramophone, accusing every single one of the island’s inhabitants of murder. And it is true, in varying degrees, for each one of them, calling into question where one draws the line between blatant murder, and culpability for a death, and where active blame could be construed as passive or indifferent lack of care for another human life.
The pseudonym of their mysterious host, as the people marooned and captive on this stormy island soon come to realise, is terrifyingly close to spelling out ‘unknown’. And this anonymity of the murderer, whose sole intention, it quickly becomes apparent, is to destroy everyone on the island one by one, is at the heart of the plot, and of the essence of the novel. Once victims of U.N. Owen begin to fall, the paranoia of each accused inhabitant, the fear over who will be next, and also the intellectual pursuit of those fighting for survival become the driving force throughout the book for those under threat, and for reader alike. Christie has no intention of letting the reader in on the secret of who the killer is. We also have to suffer the agonies of slow discovery, red herrings, blind allies and the certainty that no one is escaping alive.
The claustrophobic nature of an island they cannot escape, dichotomously housing the ultra-modern home where they are sitting ducks, and the violence of the sea and the storm they prevent them escaping, sets the tone for the real terror of the situation. For, once the ten people have searched the island and found no one else there at all but themselves, it becomes excruciatingly clear that the murderer has to be, and can only be, one of the ten people on the island. And this is the reason I have chosen And Then There Were None as July’s ‘book containing the best-kept secret’. Because it must be one of them. Yet, every time they are sure they know who it is, they are wrong in the most devastating of ways.
Slowly, chapter by chapter, the reader joins the anguish and desperate, paranoid attempts to discover who the killer must be, as the number of accused people reduces, one by one, and in a particular order, dictated by a nursery rhyme which hangs on every inhabitant’s bedroom wall. The tension increases with every death for both the characters and the reader: we are closer to the truth, yet not close enough to prevent more murders. At a basic, human level, it is devastating.
The secret of ‘whodunnit’ is kept right until the very last pages of the novel, and I defy anyone who is encountering this book for the first time to detect the killer on the island. It seems the murder is impossible to discover, unless, of course, as the people stranded on the island believe, that eventually only one will remain: the murderer. Surely? This could quite easily have become a book with no known ending. Thankfully for the reader, Christie adhered to all the rules of fiction as a member of The Detection Club, most notably to play fair with the reader. It is not because Christie broke the rules of mystery fiction that we, as readers, cannot solve the secret of this story. It is because it is meticulously plotted, and the the dialogue and thoughts of the characters are placed there for us to help in finding this secret, if only we know what to do with them.
From a personal standpoint, I have to admit that I find the last few pages of the novel a bit of a stretch in believability with regard to how the secret is revealed, and prefer the revelation, and indeed the clever ending engineering, of the three-part TV film version starring Charles Dance, Sam Neill, Toby Stephens, et al. (if you have not seen it, then I recommend it as a modern-day thriller which equally retains the historical necessities of Christie’s book). This is a personal preference, and takes nothing away from the fact that Christie’s set-up for this incredible, baffling series of deaths perpetrated by ‘unknown’ is an impenetrable as the sea would be in an escape from the island. This book is a masterclass in the fatalistic and unsolvable thriller. Clues are laid to the mindset of the murderer, yet it is phenomenally difficult, even with re-reading, to pin these revealed thoughts to the individual who exacts a form of ‘justice’ meted out meticulously to everyone on the island guilty, but never convicted, of the part they played in someone else’s death. And I mean every one.
If you were the murderer, can you think of a better way to keep the secret of ‘whodunnit’ than that?
You might also like:
Crooked House (Read Christie Challenge, June 2026): Best Book to Read in One Sitting
The Sittaford Mystery (Read Christie Challenge, January 2026): Book with the Best Opening




