Cadfael series by Ellis Peters. Many are $1.99 & $2.99 and one is $3.99.
I am still having copy/pasting problems. Here's link to the listing.
https://www.amazon.com/dp/B074CF15Y1...eries_rwt_tkin
Kobo isn't really matching much here. Book one Morbid Taste of Bones $1.99 and The Potters Field for $2.99
https://www.kobo.com/us/en/search?qu...6-f0e9ba7c6442