Genre Spotlights

Iron Flame: The Middle Book That Made the Empyrean Series Impossible to Put Down

Second books have a reputation problem. They’re often the bridge between the exciting setup and the satisfying payoff, necessary but not always memorable on their own. Iron Flame, the second book in Rebecca Yarros’s Empyrean series, is the exception that a lot of readers point to when they explain why they couldn’t stop after book one.

If you’ve finished Fourth Wing and you’re wondering whether the series holds up, or you’re considering starting the series and want to know what you’re committing to, here’s what makes book two different.

Picking Up Where Fourth Wing Left Off

Fourth Wing ends on a turn that reframes a lot of what came before it, and Iron Flame opens by dealing with the fallout immediately. Violet Sorrengail is back at Basgiath War College for her second year, except now she’s carrying knowledge that puts her at odds with people she’s supposed to trust, and the political situation she’s been thrown into has gotten considerably more dangerous.

Without spoiling specifics, the central relationship from book one becomes more complicated rather than simpler, which is part of why the series has such a devoted following. Yarros doesn’t take the easy route of resolving tension just because readers might want resolution.

Why This Book Specifically Gets Singled Out

A lot of readers describe Iron Flame as the book where the series “levels up.” The world gets bigger, the political stakes get clearer, and several characters who were side players in book one get significantly more development. It’s also, by most accounts, a darker book than Fourth Wing, the war college’s brutal training methods and the broader conflict both escalate.

There’s also the simple fact of pacing. Yarros released Iron Flame only about six months after Fourth Wing, which meant readers who’d just finished book one barely had to wait before continuing the story, a release schedule that’s part of why the fandom built momentum so quickly. Iron Flame is available as an instant PDF download here.

Do You Need to Read Fourth Wing First?

Yes, unambiguously. Iron Flame picks up immediately after Fourth Wing’s ending and assumes full knowledge of the characters, relationships, and world established in book one. This isn’t a series with standalone entries, it’s one continuous story split across books, and reading out of order would spoil major events from book one while making book two confusing.

If you haven’t started the series yet, the good news is that both books are available as instant downloads, so there’s no waiting between finishing one and starting the next, which, given how these books tend to end, is probably for the best.