Aunt Dimity Digs In is the fourth in the Aunt Dimity series by Nancy Atherton. I read quite a few of the early titles in this series back in paperback days, and enjoyed them, although I've kind of lost track of the series in the last few years.
Digs In has dropped to $1.99 at Kindle and Kobo US. Titles in this series don't go on sale very often, so grab it if you want it...
Kindle US:
https://www.amazon.com/dp/B002VFPRXW
Kindle US/Smile:
https://smile.amazon.com/dp/B002VFPRXW
Kobo US:
https://www.kobo.com/us/en/ebook/aunt-dimity-digs-in