Some bargains are sealed with blood… Others with fire… The deadliest are sealed with a kiss…

Saige Grayson has always believed stories could heal – even when her own body refuses to. As the most promising bookbinder in the capital, she’s learned to work through chronic pain and crushing debt, restoring other people’s treasures while trying not to fall apart herself. But when the man she owes decides her rare talent is worth more than her payments, Saige is traded to the Azkari – an immortal race forged by the gods for war – and imprisoned in their ancient stronghold.

Her only chance of survival lies with Archer, a fallen Azkari general imprisoned beside her – cursed, dangerous, and impossible to ignore. He offers her a way out, and in return, Saige must help him retrieve and restore an ancient book. But the book is made of living magic, powerful enough to stop a great evil – or unleash it. And as Saige works with Archer, the tome begins to awaken something dark and dangerous – both in the realm and within her.

As their enemies close in and buried memories resurface, Saige and Archer must decide what they’re willing to sacrifice: their freedom, their fragile trust… or the spark that could ignite the world.