Oh god, I just finished The Obelisk Gate, second book in The Broken Earth series by N.K. Jemisin. So good. I read the first book in the trilogy a few months ago, and howled when I realized the series wasn't completed. I managed to miss the publication date for the second book, and found it by happenstance on Sunday. Completed it early today. I've basically put my life on hold to finish this book.
Now I have to wait for the third. So impatient.
At least she seems to write fast.
The Inheritance trilogy:
The Hundred Thousand Kingdoms (2010)
The Broken Kingdoms (2010)
The Kingdom of Gods (2011)
The Killing Moon (2012)
The Shadowed Sun (2012)
The Broken Earth trilogy:
The Fifth Season (August 2015)
The Obelisk Gate (August 2016)
So you have maybe a year, at most, possibly sooner? Based on her previous speed in those other series, at least (this year gap was the longest so far, so maybe it'll increase).
Much better than the 3-5 year gaps from some authors. :)
Added this series to my list to get when the final one is out! (Assuming I like her Inheritance trilogy--halfway through the first one, pretty good so far.)