Out of curiosity, I checked the Kindle for Samsung app today, and at the bottom main page where it shows the covers of your purchased books, I selected the Samsung Book Deals tab.
It showed four new books:
Key Witness (Emily Etcitty Book 1) by Sandra Bolton
Here in My Heart: A Novella (An Echoes of the Heart Novella Book 1) by Anna DeStefano
Girl on the Moon by Jack McDonald Burnett
The Undesirables by Chad Thumann
If instead, you select Samsung Book Deals from the menu, you'll just see the message about the program shutting down.
Anyway, I decided to buy Girl on the Moon, and I got it for $0.00, and the other books then showed as $1.99. It seems to me that they had already selected the books for November when the program was cancelled, and they're still showing up in the app. I don't know when these will go away. Perhaps tomorrow, since the program ends Nov. 1, today (not Oct. 31.)
I also noticed while getting the URL's that Amazon's current price for all of these selections is $0.99, except for Girl on the Moon, which is $3.99.