The August theme for the Read Christie challenge is ‘Beloved Duo’, so one of her Tommy and Tuppence books was the obvious choice for this month! I’ve read the first three in the series, which made this an ideal opportunity to pick up the next one, By the Pricking of My Thumbs.

Tommy and Tuppence Beresford, unlike Christie’s other detectives, age in real time throughout the series. When we first meet them in The Secret Adversary, published in 1922, they are young people in their early twenties; in By the Pricking of My Thumbs, published in 1968, they’re now in their sixties. Christie herself, of course, was also growing older and the topic of ageing forms a prominent part of this novel. It begins with a visit to Tommy’s elderly Aunt Ada at Sunny Ridge Nursing Home, where Tuppence falls into conversation with another resident, a Mrs Lancaster. She’s a sweet, friendly old lady and the two are getting along well – until Mrs Lancaster suddenly refers to something hidden behind the fireplace and asks Tuppence, “Was it your poor child?”

Tuppence is still thinking about those words several weeks later when Aunt Ada dies and she and Tommy return to Sunny Ridge to collect her belongings. Tuppence hopes to speak to Mrs Lancaster again, but is told that she has gone, having been taken away by a relative. Instinctively feeling that something is wrong, Tuppence tries to track down Mrs Lancaster but no one seems to know exactly where she could be. The only clue is a painting Mrs Lancaster gave to Aunt Ada before her death, showing a house by a canal. Tuppence is sure she’s seen that house before, possibly from the window of a train, so while Tommy is away from home attending a conference, Tuppence decides to find the house again in the hope that it will lead her to Mrs Lancaster.

This is a particularly dark Christie novel, which is to be expected considering the title comes from Shakespeare’s Macbeth (“by the pricking of my thumbs, something wicked this way comes”). I found it creepy and unsettling, with all the talk of dead or missing children, Mrs Lancaster’s complete disappearance, and the descriptions of the house, partially abandoned and, as one character says, ‘put to the wrong use’. The scenes at Sunny Ridge also show, quite disturbingly, how the concerns of elderly people can easily be dismissed as confusion or dementia. Tommy and Tuppence themselves, though, are a delight to spend time with, as always, especially Tuppence who has to learn to accept that although she may still be a lively, adventurous young woman at heart, her physical limitations are catching up with her and she can’t do all the things she used to do.

Although this book is maybe not as tightly plotted as some of Christie’s others and not one of her absolute best, it’s still very enjoyable. I found the ending quite chilling – I hadn’t guessed the solution and the culprit was someone I had never suspected. Now I only have one Tommy and Tuppence book left to read: Postern of Fate, which I’m hoping to read for the Read Christie challenge later this year.

Book 17/20 of 20 Books of Summer