This is really a blog for Japanese books; I'm not going to have a review of one ready for a few days. So I thought that since detective stories are one of the blog's themes, I could just quickly note down an idea about Agatha Christie's famous disappearance. I imagine that thousands of readers have had the same idea; but I've never actually seen it written down. So here it is.
In 1926 Christie disappeared mysteriously for ten days. There was a massive search for her; and she was eventually found at a hotel in Harrogate. Some thought it was a publicity stunt, others that she had lost her memory under psychological stress. Her husband had just told her that he wanted to leave her for another woman. Until she was found, there were people who suspected him of having killed her. When I first read about it, the general view was that it was certainly a reaction to the stress of the impending divorce, perhaps with some attempt to embarrass her husband or his mistress, which is the line that Wikipedia currently favours.
In fact just four years after the incident, Christie published a short story, which reads like a confession to me; and it gives a picture of her actions much like what others have supposed. "The Affair at the Bungalow" (1930) is one of a series of short stories, later published in
The Thirteen Problems (1932), in which guests at a party tell of mysteries they have experienced, and the other guests try their hand at solving them, with Miss Marple always finding the correct solution at the end.
For the rest, I can't avoid giving the plot to that particular story away. So stop now, if you care.