And yet one more ^^^^ PPP author/series with a couple of unusual price drops.
A while back Mary Reed and Eric Mayer wrote a series set in Constantinople, featuring John, the Lord Chamberlain to the Emperor Justinian. I really liked this series, and when I was lucky enough to visit Istanbul on a business trip, I enjoyed the background knowledge I'd picked up while reading it. (And also while reading Barbara Nadel's contemporary Inspector Ikmen series...and Jason Goodwin's Investigator Yashim books...and...)
Now the first in the series,
One for Sorrow, is on sale for only $2.99 in the US.
Kindle US:
https://www.amazon.com/dp/B07VMH4KG8
Kobo US (discountable):
https://www.kobo.com/us/en/ebook/one-for-sorrow-35
And the tenth,
Ten for Dying, is even less at the moment - it's $1.99 at Kindle and Kobo US.
Kindle US:
https://www.amazon.com/dp/B07VPKSF86
Kobo US (also discountable):
https://www.kobo.com/us/en/ebook/ten-for-dying-5
Another of many series that I wish had kept going...