This month – and in August and September – the Read Christie challenge is moving on to books published in the 1940s and 1950s. I have several unread Christies from those decades to choose from, but I decided to start with N or M?, a Tommy and Tuppence novel from 1941. I enjoyed the first two T&T books, The Secret Adversary and Partners in Crime, and this is the third in the series.
I think this is a series best read in order as, unlike Poirot and Miss Marple, Tommy and Tuppence age almost in real time; they were in their early twenties in 1922’s The Secret Adversary and when we join them at the beginning of N or M? they are over forty. Their advancing age has become a source of frustration to them now that the world is at war and it seems that they are too old to make any meaningful contribution. Then, Mr Grant, a secret agent, arrives with an intriguing proposition for Tommy. He must travel undercover on behalf of the Secret Service to a boarding house on the south coast of England in search of two German spies, one male and one female, known only by the initials N and M. The mission must be kept secret from everyone, including Tuppence, who is told that Tommy is being sent to Scotland to take up a boring office job. However, Tuppence is already one step ahead and determined not to miss out on the excitement!
N or M? is more of a thriller/espionage novel rather than a traditional detective novel, which made a nice change from my last two Read Christie selections, which have both been Poirot mysteries. One of the good things about diving into Christie’s books more or less at random as I have been doing over the last few years is that there’s enough variety within her body of work that you never really get bored. However, there’s still a mystery to be solved here – the mystery of the true identities of N and M – and plenty of clues to look out for. I found it very easy to identify one of the spies (and was frustrated that Tommy and Tuppence didn’t work it out as quickly as I did), but I didn’t guess the other one so there were still some surprises in store for me.
With most of the novel being set in and around the Sans Souci boarding house, this means all of the suspects are together in one place, giving Tommy and Tuppence plenty of opportunities to observe them. The most obvious is Carl von Deinim, a German refugee and research chemist, but is he too obvious? The other guests include a larger than life Irishwoman, a retired Major, an invalid and his wife, and a young mother with her two-year-old daughter. Literally anybody could be a spy and Christie does a great job of capturing the sense of danger, mistrust and paranoia. I was quite worried for Tommy and Tuppence at times, even though I knew they must survive as there are more books in the series!
I’ve found that the other Christie novels I’ve read that were published during this same time period barely mention the war, if at all, so it was unusual to find one in which the war is such a central part of the plot and affects the lives of the characters in so many ways. I really enjoyed it and am looking forward to reading the next Tommy and Tuppence book, By the Pricking of My Thumbs – although not just yet, as it’s published in 1968 and we’ll be staying in the 40s and 50s for the next two months.
This is book 11/20 of my 20 Books of Summer 2024.


