Nine Lessons is the most recent (2017) in Nicola Upson's series featuring Josephine Tey as the protagonist. It has dropped to £2.37 at Kindle UK, not bad for a most-recent-in-series. FWIW the blurb claims that it was chosen by
Publishers Weekly as one of the Best Books of 2017 - no idea if this means much or not.
link:
https://www.amazon.co.uk/Nine-Lesson...dp/B074GDVMX3/
I also noticed that the first title in the series,
An Expert in Murder, is only £0.98, so if you want to try the first one first, it won't cost you much

.
link:
https://www.amazon.co.uk/Expert-Murd...dp/B002RI9ZU4/