Two more books in Jennifer Estep's Elemental Assassin series are on sale in the US right now for $2.99 each, one a repeat, and one I haven't seen on sale since I've been watching this series.
The Spider, #10, only on sale at Kindle US
see this previous post:
https://www.mobileread.com/forums/sh....php?p=4361310
Black Widow, #12
Kindle US:
https://www.amazon.com/dp/B00IWTWJD2
Kobo US:
https://www.kobo.com/us/en/ebook/black-widow-101