An odd collection of books in Mel Starr's Hugh de Singleton series are on sale: the 1st, 4th, 6th, 8th, 10th, 13th, and 15th. The first one goes on sale a lot, but some of the others, not so much. Go figure! $1.99 in the US and £0.99 in the UK...
The Unquiet Bones, #1
Kindle US:
https://www.amazon.com/dp/B00HPUM58S
Kindle UK:
https://www.amazon.co.uk/dp/B00HPUM58S
Unhallowed Ground, #4
Kindle US:
https://www.amazon.com/dp/B00EUBOYG6
Kindle UK:
https://www.amazon.co.uk/dp/B00EUBOYG6
Rest Not in Peace, #6
Kindle US:
https://www.amazon.com/dp/B00FFX3BM6
Kindle UK:
https://www.amazon.co.uk/dp/B00FFX3BM6
Ashes to Ashes, #8
Kindle US:
https://www.amazon.com/dp/B0156VSF0O
Kindle UK:
https://www.amazon.co.uk/dp/B0156VSF0O
Deeds of Darkness, #10
Kindle US:
https://www.amazon.com/dp/B0748LDLMG
Kindle UK:
https://www.amazon.co.uk/dp/B0748LDLMG
The Easter Sepulchre, #13
Kindle US:
https://www.amazon.com/dp/B08HMZBWRF
Kindle UK:
https://www.amazon.co.uk/dp/B08HMZBWRF
Suppression and Suspicion, #15
Kindle US:
https://www.amazon.com/dp/B0B28YQQD9
Kindle UK:
https://www.amazon.co.uk/dp/B0B28YQQD9
ADD: I now note that a new one,
A Polluted Font, is coming out in a few days, so maybe that's the reason. But still, an odd selection...