Black Drop by Leonora Nattrass is a historical mystery/thriller that was, per its blurb, one of the Times‘ best historical fiction books of 2021, and a Sunday Times Book of the Month. It’s £0.99 today as part of the UK Kindle Daily Deal. I’ve not read this author, but the blurb sounds pretty cool, if maybe a bit on the dark side. However, ratings are slightly under 4.0 at both Kindle and Goodreads so YMMV…
Buy at Kindle UK