A decade or so ago, Jane Finnis wrote a short, rather obscure, four-book series set in northern Roman Britain, that I quite liked, featuring innkeeper Aurelia Marcella. The second in the series is now on sale in the US.
A Bitter Chill, $2.99
Kindle US:
https://www.amazon.com/dp/B07VQKZN3T
Kobo US (discountable):
https://www.kobo.com/us/en/ebook/a-bitter-chill-6