I've really enjoyed Trudi Canavan's Black Magician and Traitor Spy series, but haven't read any of her Millennium's Rule series. (Although I have the first book, which I bought back when it was on sale, but it's still in my TBR pile.)
Now here is the second book in the series,
Angel of Storms, on sale for $1.99 at Kindle and Kobo US. I can't decide whether to try to read at least the first few chapters of the first book now, before buying the second, or just trust that I'll like this series since I really liked the other two. Decisions, decisions!
Anyway, here's info:
Kindle US:
https://www.amazon.com/dp/B00V3MXYRU
Kindle US/Smile:
https://smile.amazon.com/dp/B00V3MXYRU
Kobo US:
https://www.kobo.com/us/en/ebook/angel-of-storms-1