The Poisoned Chocolates Case by Anthony Berkeley was first published in 1929 but I read the recent British Library Crime Classics reprint. It has an introduction by Martin Edwards.
The book begins at a gathering of the Crime Circle, a club for crime fiction writers, and Chief Inspector Moresby of Scotland Yard has gone there to ask the writers for their help. The Scotland Yard detectives are stumped over a case of murder by poisoning and Moresby hopes that the writers might be able to give them some new ideas as to who the culprit might be.
This of course involves each of the writers in turn explaining how they think the murder was committed and by whom. They all come up with different ideas of course, but which one is correct?
This isn’t my favourite style of writing as it can become a bit tedious at times with the constant repetition of facts in the case. I found myself being more interested in who the fictional detectives were based on in reality. I think that Dorothy L. Sayers was very easy to spot, but I’m not so sure about the other two female writers.
In 1979 the writer Christianna Brand wrote yet another solution to this murder puzzle and that chapter is included in this book, and Martin Edwards has the last word with his epilogue.
If you’re interested you can read about Anthony Berkeley in an interesting article by Martin Edwards here