When Christ and His Saints Slept is the first in Penman's series about that amazingly dysfunctional family, the Plantagenets. It has dropped to $2.99 at Kindle and Kobo US. It's normally $11.99 and doesn't go on sale much, so grab it now if you want it!
Kindle US:
https://www.amazon.com/dp/B004JF5YU8
Kindle US/Smile:
https://smile.amazon.com/dp/B004JF5YU8
Kobo US:
https://www.kobo.com/us/en/ebook/whe...s-saints-slept