The first three titles in Mel Starr's excellent IMO Hugh de Singleton series are on sale at both Kindle US and UK.
The Unquiet Bones, $0.99/£0.95
Kindle US:
https://www.amazon.com/gp/product/B00HPUM58S/
Kindle UK:
https://www.amazon.co.uk/gp/product/B00HPUM58S/
A Corpse at St Andrew’s Chapel, $1.99/£1.92
Kindle US:
https://www.amazon.com/gp/product/B00D86OWWU/
Kindle UK:
https://www.amazon.co.uk/gp/product/B00D86OWWU/
A Trail of Ink, $2.99/£2.88
Kindle US:
https://www.amazon.com/gp/product/B00EUBOYBQ/
Kindle UK:
https://www.amazon.co.uk/gp/product/B00EUBOYBQ/