The second book in the Miss Maud Silver mysteries.
There was a 10 years gap between Grey Mask (Miss Silver Book #1) and The Case is Closed (Book #2), in which she wrote a number of non Miss Silver mysteries. She brought Miss Silver back due to popular demand, and continued to write 30 more in the series, bringing the total up to 32 books.
The Miss Silver mysteries are my go to reads/listen, and have been since I was 14. I think that it is the fact that Ms Wentworth was an excellent story-teller, bringing mystery and romance to each book she wrote in the series.
There have been several narrators over the years, but I personally love listening to Diana Bishop, who I think brings the stories alive with her narration.
The Everton murder case has long been closed. The culprit has been charged with the murder of his uncle and has served a year of his sentence already. Or has he? The evidence against Geoffrey Grey is convincing but his wife believes in his innocence. And so does her young cousin, Hilary, who decides to solve the mystery herself. But when Hilary herself is nearly murdered she turns in desperation to her ex-fiancé for help. He calls upon the services of Miss Silver to help solve another mystery, which she does in her own original style.
If you have not yet read any of the Miss Silver mysteries yet, you are missing out!