This is a Tommy and Tuppence novel. The two married investigators are working during the second world war in this particular novel.

A mysterious message containing the phrase from the title is uncovered, and to investigate involves undercover sleuthing by the sea.

http://notfreesf.blogspot.com/2009/11... ( )

Set in WWII, this features the lesser known heros of Agatha Christie novels - Tommy and Tuppence Beresford, a forty-something married couple that works on and off for the British government. In this one, they need to decipher a cryptic message: "N or M Song Susie". This leads them to a seaside resort where they change their identities in order to operate undercover. This was my first Agatha Christie book (I've seen a few of the movies that features either Poirot or Marple) and it wasn't bad. It did have some suspense (I did figure out one part but not the whole thing) but I found the resolution a bit confusing. Perhaps I missed something in the explanation at the end. But I did enjoy it. I had to chuckle over the fact that the Beresfords were considered quite over the hill and not very useful by their children and government - at the ripe old age of 46! So, I only have a few more years of usefulness apparently. LOL ( )

N or M? is my least favorite Agatha Christie novel so far. Halfway thought the novel I realized that absolutely nothing of any importance has happened yet. I pushed on and found that the mystery came together nicely in the end. I'm glad I stuck with the book but half a novel of set-up before any action is pretty extreme. The book had it's rare moments of surprise, but not enough for me to ever recommend it to others. ( )

It's Agatha Christie and her deceptive clues, a little boring at first but it gets better. Too bad the plot wasn't solid because I was able to discern the culprit ( )

A surprisingly predictable mystery by Agatha Christie. I kept saying to myself: "Surely, the solution is not *that* obvious. This must be a red herring." But no: The solution was *that* obvious. And so are all the other smaller "surprises" along the way.
It is nevertheless an entertaining read: With the (then) contemporary war time settings, this is the closest Christie ever wrote in terms of a propaganda style, support-our-troops, the-walls-have-ears, loose-lips-sink-ships story. ( )