Both titles in Chris Nickson's Dan Markham series have dropped in price at both Kindle and Kobo US (coupon/VIPable).
Dark Briggate Blues, #1, $1.49
Kindle US:
https://www.amazon.com/dp/B01HQL9PQA
Kobo US:
https://www.kobo.com/us/en/ebook/dark-briggate-blues
The New Eastgate Swing, #2, $2.99
Kindle US:
https://www.amazon.com/dp/B01M0PO19H
Kobo US:
https://www.kobo.com/us/en/ebook/the...stgate-swing-1