@OriginalBarbas I had to look up Knox's Commandments: cozy-mystery.com/blog/knoxs-commandments-the-10-rules-of-golden-age-detective-fiction-part-i/

Enjoyed discovering them. Thanks.

@marvinfreeman Cheers! I started reading novels from the Golden Age of Detectives recently and, even though I usually cannot solve them, like the fact that they can be solved. There is a nice short story collection, The Sins for Father Knox, that has 10 stories and in each of them you can try to solve it to find the culprit and which commandment has been broken.