Today's Big Deal at Kindle UK is six books by Simon Beckett for £0.99 each, including four of the six books in Beckett's David Hunter series. Sadly, not matched, at least as of now, at Kobo UK.
Titles are:
The Chemistry of Death (Hunter #1),
Whispers of the Dead (Hunter #3),
The Calling of the Grave (Hunter #4),
The Restless Dead (Hunter #5),
Stone Bruises (non-series), and
Where There's Smoke (non-series).
Kindle UK:
https://www.amazon.co.uk/b/node=4725112031
ADD:
And if you don't like /can't shop in the UK, two of the books in the Hunter series are $1.99 in the US, and discountable at Kobo US.
Whispers of the Dead, #3
Kindle US:
https://www.amazon.com/dp/B0B2ZN8D6S
Kobo US:
https://www.kobo.com/us/en/ebook/whi...of-the-dead-14
The Scent of Death, #6 and most recent
Kindle US:
https://www.amazon.com/dp/B0B2Z6RKQ1
Kobo US:
https://www.kobo.com/us/en/ebook/the-scent-of-death-6