The Codex writes in iron. And once your name is written, you cannot escape.
Venice burns in shadow and flame. The Inquisition hunts whispers of forbidden knowledge, and Isabella di Rossi carries its greatest secret: a fragment of the Iron Codex, a book that does not merely record the world - it rewrites it.
Fleeing across a Renaissance Italy haunted by fire and betrayal, Isabella discovers that the Codex calls not just to her blood, but to her very soul. The Hound of Ash, relentless inquisitor and executioner, pursues her from canals to cloisters, determined to chain the Codex's power in the name of order.
Allies gather - a defiant swordswoman, a glassmaster who bends fire, a thief with too-careful conscience - yet even they cannot shield Isabella from the Codex's hunger. Deep in the Sibyl's cave, as mountains shake and volcanic fields awaken, she must face the ultimate truth:
doors do not stay closed forever.
And when the Door of Ash listens, it will demand an answer.
The Iron Codex is the second volume in The Door of Ash trilogy, a sweeping tale of forbidden knowledge, betrayal, and destiny, perfect for readers of Deborah Harkness, Ken Follett, and Andrzej Sapkowski.
Will Isabella master the Codex... or will it master her?