Although this is the third in a series of murder mystery novels it does not matter if you haven't read the preceding stories - as I hadn't. The most salient facts from those stories, which have any relevance to this one, are recapped in such a way that the new reader does not feel left out and readers of the other books have their memory jogged. The book successfully captures the era of post-war Britain in the mid-1930s and the use of known historical facts (Edward & Mrs Simpson, Oswald Moseley, the Spanish Civil War) lend credence to the story. I can imagine this being made into a BBC drama! I'm now looking for the other books in the series.