Blood Code - He is the Code. She is the Key. (en Inglés) - Helena Karsen

After the Genetic War, the world has been divided into three castes: the Pureborn, descendants of government-engineered bloodlines controlled by the Central Authority; the Contaminated, whose DNA was altered through failed genetic experimentation; and the Residuals, unmodified humans stripped of status and condemned to society's lowest levels.

Every birth is registered. Every genetic sequence archived. No one is truly free.

Ian Stafford works as a bioinformatics technician beneath the towers of Nova-Eden, capital of the new world order. He lives in isolation, haunted by sudden neurological episodes the authorities suppress with mandatory medication. But the blackouts conceal something far more dangerous: whenever Ian loses consciousness, he sees unfamiliar faces, fractured memories... and a symbol carved into blood.

A code that should not exist.

When Liv Harrow, a researcher in the Department of Biogenetic Security and a member of the Pureborn elite, accidentally decrypts a forbidden sequence known as the Blood Code, she discovers that it is embedded within Ian's DNA.

His blood is the code.

But somewhere there is also a key, capable of reactivating a classified pre-war protocol: a project designed to rewrite human evolution itself.

As Liv struggles to understand the true meaning of the discovery and protect Ian from the government closing in around them, Ian begins recovering memories the regime erased long ago: illegal experiments, selected fetuses, sacrificed mothers.

His existence was never an accident.

He is the most dangerous weapon ever created.

In a world where blood determines who you are, Ian must decide whether to fight for what remains of his humanity... or become the origin of a new species.

And Liv must discover how far she is willing to follow him.