The Undying

A man who should have died four centuries ago is still young.

A dying scientist has rediscovered the secret he tried to erase.

And the archivist who uncovers them both is about to learn that every miracle leaves bodies in the record.

Antwerp, 1571. When plague takes Matthijs van Aelst's wife, the physician devotes himself to defeating the one enemy medicine cannot cure. Six years later, at fifty-nine, he tests an experimental treatment on three desperate patients.

All three die.

The fourth subject is Matthijs himself.

His scars vanish. His hair darkens. His failing body begins to reverse its age until he appears thirty years old-and remains that way.

Terrified of what rulers, armies, and wealthy patrons would do for immortality, Matthijs destroys every formula, dosage, sample, and process capable of reproducing the treatment. For centuries, he survives beneath borrowed names, erasing records and silencing discoveries whenever science comes too close to uncovering his secret.

Then, in 2026, Chicago archivist Mara Baptiste finds the same face in photographs taken in 1894, 1919, 1942, and 1965.

Her search leads to a fire-damaged file labeled SUBJECT IV-and to Dr. Lena Ortiz, Matthijs's brilliant longtime partner, whose independent research may have discovered a second path to human rejuvenation.

Lena is dying. Her work could save her life. It could also unleash a treatment that governments would weaponize, corporations would monopolize, and millions would kill to possess.

Matthijs has protected the secret for centuries, and he has already made his decision: Lena's research must disappear.

But Mara is restoring the names of the people he erased. Lena refuses to let an immortal man decide what happens to her body. And as the truth closes in, Matthijs must confront the question he has avoided for four hundred years:

Did he save the world from immortality-or simply appoint himself its ruler?

The Undying is an epic historical science thriller about grief, dangerous knowledge, medical power, and the devastating difference between protecting humanity and choosing its future.