https://www.themarysue.com/all-iron-flame-spicy-chapters-confirmed/

So, the hype got to you, huh? Don’t worry, you’re not alone. After all, Rebecca Yarros’ Empyrean series is one the most popular adult fantasy series of the 21st century, with its third novel, Onyx Storm, becoming the fastest-selling adult fantasy novel in 20 years (it sold 2.7 million copies in its first week of release).

Before you can dive into Onyx Storm, though, you’ll first have to read Fourth Wing and Iron Flame, as they set up the all-important and overwhelming romantic relationship between the series’ protagonists, Violet Sorrengail and Xaden Riorson, as well as the war between the Continent and the venin; dark magic wielders who steal their power from the world they inhabit.