THE SANGUINARY PROOF

On the Archipelago of Ash, the rain bleeds.

Praetor Gaius Flaminius has led his Roman legion to a volcanic island chain seeking conquest. What he finds is a horror no sword can cut: a city that exists in multiple versions at once, a sky that weeps arterial red, and seven of his soldiers dead without a wound-drained not of blood, but into it.

The island is ruled by the Triarchs: three women who are iterations of the same four-hundred-year-old self. They practice métronurgy-the mathematics of blood. To them, blood is not merely life; it is memory, probability, and doorway. Every drop carries the architecture of every moment its body might have lived. By cutting their palms and calculating, they can reach into the tree of branching realities, collapse unwanted timelines, and make the desired ones real.

The cost? The versions that die in the collapsed branches do not vanish. They manifest as blood. Warm. Conscious. Screaming.

Archimedes is a coroner from Syracuse, summoned to examine the bloodless corpses. He has spent seven years studying métronurgy, ever since his wife died-not in one timeline, but in all of them, pruned from existence by someone who used her as fuel. He understands the mathematics. He understands the horror. He does not understand why the Triarchs have allowed him to live.

Now the Red Rain has come again, and the Triarchs need Archimedes to solve the Deathless Proof: a calculation that would collapse every duplicate self into one, ending their immortality, releasing four centuries of accumulated guilt-and killing thousands of branch-beings trapped in the island's blood-soaked stone.

But the Proof demands an answer to a terrible question: How many versions of yourself are you willing to kill?

As Flaminius discovers that he and his men have been adopted into the Triarchs' bloodline-bound as fuel for their workings-Archimedes must decide whether to complete the Proof and end the nightmare, or find another way: a mathematics of survival that doesn't require sacrifice.

The blood remembers everything.
The blood wants to live.
And the ground beneath your feet is warmer than it should be.