The Death of Lucy Kyte is the fifth in Nicola Upson's series featuring real-life author Josephine Tey as the protagonist. It has dropped to $1.99 at Kindle and Kobo US.
Kindle US:
https://www.amazon.com/dp/B00FJ32YF2
Kobo US:
https://www.kobo.com/us/en/ebook/the...of-lucy-kyte-1