Recommend with caveats
In a nutshell, my review of this book would be: Nothing happens until page 232 and from then on the book is deadly dull. However, I would recommend it for those who enjoy superb writing, because as usual Gladys Mitchell's descriptive powers are substantial. The setting is among upperclass, educated Brits in Greece. The exact time period was unclear, I think it would have to be between the first and second world wars. Her description of the young boys is particularly good. Read for style, not for plot.