Iron Flame cover
Listen on Audible ↗

New to Audible? First month free ↗

Buy Print — Amazon ↗
Free with Kindle Unlimited

📦 Complete the series

The Empyrean Series 3 Books Collection Set (Fourth Wing, Iron Flame & Onyx Storm) (3 books) ↗

Iron Flame

Rebecca Yarros · 2023

The Empyrean · Book 2

Spice Level

🔥🔥🔥🔥🔥 explicit, moderately frequent

Tropes

Dragons Dark Academia Slow Burn High Steam Morally Grey Love Interest Political Intrigue Secret Identity / Hidden Power Betrayal Chosen One Cliffhanger Ending Found Family

Content Warnings

Graphic Violence War and Atrocities Death of Major Character Torture

Series Status

ongoing

Protagonist

mortal

Last reviewed: 2026-06-20

If you liked Iron Flame…

See all 3 recommendations →
A Court of Wings and Ruin cover Book 3 🎧

A Court of Thorns and Roses

A Court of Wings and Ruin

Sarah J. Maas

🔥🔥🔥🔥🔥
Books like this →

Second-book war escalation with comparable explicit heat

Buy on Amazon ↗
From Blood and Ash cover Book 1 🎧

Blood and Ash

From Blood and Ash

Jennifer L. Armentrout

🔥🔥🔥🔥🔥
Books like this →

Comparable heat and an emotionally complex morally grey love interest

Buy on Amazon ↗
Kingdom of Ash cover Book 7 🎧

Throne of Glass

Kingdom of Ash

Sarah J. Maas

🔥🔥🔥🔥🔥
Books like this →

War epic with comparable heat and high emotional stakes

Buy on Amazon ↗