Five of the titles in Peter King's Gourment Detective series, and an omnibus of the first four titles are on sale at Kindle US, and at Kobo US (coupon/VIPable) as well, except for the omnibus.
The Gourmet Detective Books 1–4: The Gourmet Detective, Spiced to Death, Dying on the Vine, and Death al Dente, $3.99:
https://www.amazon.com/dp/B07CXGK4D6
The Gourmet Detective, #1
Kindle US:
https://www.amazon.com/dp/B0096M15NE
Kobo US:
https://www.kobo.com/us/en/ebook/the-gourmet-detective
Spiced to Death, #2:
Kindle US:
https://www.amazon.com/Spiced-Death-...dp/B0096LJOMY/
Kobo US:
https://www.kobo.com/us/en/ebook/spiced-to-death
Dying on the Vine, #3:
Kindle US:
https://www.amazon.com/dp/B0096LJSU2
Kobo US:
https://www.kobo.com/us/en/ebook/dying-on-the-vine
Eat, Drink and Be Buried, #6:
Kindle US:
https://www.amazon.com/dp/B0096M147Q
Kobo US:
https://www.kobo.com/us/en/ebook/eat...-and-be-buried
Dine and Die on the Danube Express, #8:
Kindle US:
https://www.amazon.com/dp/B0096M14OY
Kobo US:
https://www.kobo.com/us/en/ebook/din...danube-express