[sufue]

Corpses in Enderby is the 22nd (per SYKM) in the Inspector Littlejohn series by George Bellairs. (The webpage title says it's the 13th, and the webpage blurb says it's the 16th, but I think this is another one of those things where multiple publishers have rights to part of the series, and they each count from the start of the titles they have. Personally, I believe SYKM...)

In any case, Enderby is free right now at Kindle US and UK.

Kindle US: https://www.amazon.com/dp/B078XH5H6W
Kindle UK: https://www.amazon.co.uk/Corpses-End...dp/B078XH5H6W/

Spoiler:

A murder in plain sight brings Scotland Yard to investigate family secrets in a sleepy village in Leicestershire.

Ned Bunn wasn’t a popular member of the community of Enderby. There were people who had wished him dead.

But when he is murdered on the doorstep of his own shop there’s a terrible outcry, the community is in shock. Littlejohn of Scotland Yard investigates the case and finds there are some startling revelations about Bunn and his family, before the murderer is finally tracked down.

Corpses in Enderby is the sixteenth title in Agora's Inspector Littlejohn Mysteries.