Thereโs always been something compelling about numbers in book titles. They feel specific, precise, and strangely magnetic. My fascination likely began with Agatha Christieโs And Then There Were None. The queen of mysteries herself, Christie used numbers with such elegance, weaving them seamlessly into the structure of her stories.
My own debut, Nine Dolls, carries both a number (just one less than Christieโs) and the haunting presence of dolls. It is, in many ways, my small tribute to herโan author who continues to inspire me from beyond the grave.
Interestingly, And Then There Were None isnโt on my list below. Originally titled Ten Little Niggers (and later Ten Little Indians), the book has since shed its numbered title for obvious reasons. Christieโs mysteries, however, remain timeless. In fact, three more of her works do make the list.
Here are my favourite crime novels with numbers in their titles:
The Woman in Cabin 10 by Ruth Ware
On a luxury cruise, a travel journalist believes she has witnessed a body being thrown overboardโyet everyone insists Cabin 10 has been empty all along. What follows is a clever, disorienting tale that makes you question everything you know. This is one adaptationโalongside The Housemaidโthat Iโm eagerly awaiting!
Nine Dolls by Rupa Mahadevan
Yes, this oneโs mine. In this award-winning psychological thriller, a newlywed woman joins her husband and his friends at a remote Scottish manor to celebrate Navaratri, the Hindu Festival of Dolls. The sacred dolls must not be moved during the nine nightsโbut when the ritual is broken, and the dolls are shifted, it can mean only one thing: an imminent death.
Eight Perfect Murders by Peter Swanson
A Boston bookseller who once compiled a list of the most โperfectโ unsolvable murders finds himself living a nightmare when a killer begins recreating them. A chilling exploration of how imagination can spiral into deadly reality kept me at the edge of my seat.
The Seven Deaths of Evelyn Hardcastle by Stuart Turton
A dazzlingly inventive mystery. A man must solve the murder of Evelyn Hardcastle, but heโs trapped in a time loop, waking each day in the body of a different guest. He has only one day to solve the crimeโor lose his memory and start over. Twisty, fast-paced, and brilliantly disorienting.
The Girl in 6E by A. R. Torre
The first in the Deanna Madden series. A cam girl who never leaves her apartment spends her nights watching strangers through a screenโuntil sheโs drawn into a chilling murder plot that threatens to break her carefully constructed isolation. This story resonates even more today, in an age of doorbell cameras and constant surveillance, feeding into the unsettling truth that perhaps no one is truly safe, even within the supposed safety of their own home.
Five Survive by Holly Jackson
Six friends set out on an RV trip, only to find themselves stranded on a deserted road, targeted by a sniper. Not all of them will make it out alive.
4.50 from Paddington by Agatha Christie
Not technically a whole number, but unforgettable, nonetheless. In this Miss Marple classic, a passenger witnesses a murder from a moving train. Christie was crafting โlocked roomโ mysteries before the term even existed, and this remains one of my favourites.
Three Act Tragedy by Agatha Christie
At a dinner party hosted by an actor, a seemingly harmless cocktail turns fatal. When more deaths follow, Hercule Poirot must unravel a mystery staged like a theatrical performanceโmurder in three acts.
Two Kinds of Truth by Michael Connelly
Harry Boschโafter Jack Reacher, my favourite American detectiveโreturns in a thriller that pulls him into two investigations: a drugstore murder and a cold case that refuses to stay buried. Boschโs flaws make him deeply human, and thatโs what makes him unforgettable.
One of Us Is Lying by Karen M. McManus
Five high schoolers walk into detention. Only four walk out. Each of them has secrets, and one of them will kill to keep theirs hidden.
Towards Zero by Agatha Christie
A lesser-known but brilliant Christie novel, where Superintendent Battle uncovers how a murder is not the beginning of a crime but the inevitable endgame of a chain of eventsโtowards zero.
Of course, I could โcheatโ and add my favourite series: James Pattersonโs Womenโs Murder Club. The clever numbering in those titles is a testament to Pattersonโs masteryโbut thatโs a list for another day.
Rupa Mahadevan is an award-winning author of psychological thrillers. Her debut novel Nine Dolls won the Joffe Books Prize in 2024 has recently been published. She grew up on the south-eastern coast of India and has lived on the south-eastern coast of Scotland for over 15 years. She now resides in Edinburgh with her husband and two children. When she isnโt working on Excel in her day job, she enjoys reading and imagining her own stories. Follow Rupa on Facebook, or on Instagram atย @rupa_mahadevan.
