The Butcher Of Smithfield is the third in Susanna Gregory's Thomas Chaloner series. It has dropped to $0.99 at Kindle and Kobo US.
Kindle US:
https://www.amazon.com/dp/B00GW4QB7Y
Kindle US/Smile:
https://smile.amazon.com/dp/B00GW4QB7Y
Kobo US:
https://www.kobo.com/us/en/ebook/the...f-smithfield-1