Joan Wolf is one of my favorite Regency romance authors, but she also wrote two medieval mysteries many years ago. Now both are on sale for $1.99 in the US, and discountable at Kobo. There are definitely romance elements in them, but I think of them more as mysteries, and
SYKM lists them, so I'm posting here. I enjoyed both, and wish she had written more...
No Dark Place, #1
Kindle US:
https://www.amazon.com/dp/B002Q1YE5S
Kobo US:
https://www.kobo.com/us/en/ebook/no-dark-place-2
The Poisoned Serpent, #2
Kindle US:
https://www.amazon.com/dp/B002Q1YDJA
Kobo US:
https://www.kobo.com/us/en/ebook/the-poisoned-serpent-2