A six-hundred-year-old manuscript no one can read.

A hidden sisterhood that has guarded its meaning for two thousand years.

The moment has come to decide whether the world is ready to know.

Sisters of Twelve

For nearly six hundred years, one of the world’s most mysterious books has defied explanation.

Known as the Voynich Manuscript, the strange illustrated manuscript now housed in a library at one of our nation's oldest universities is written in a language no one has ever deciphered. Carbon dating places the parchment in the early fifteenth century, yet its meaning remains unknown. Cryptographers, historians, and scientists have studied it for generations. Even elite codebreakers from World War II attempted to unlock its secrets and failed.

No one has ever proven what it says.

But what if the manuscript was never meant to be deciphered?

In Sisters of Twelve, the mystery of that book is only the surface of something far older. A hidden lineage of women has spent nearly two thousand years safeguarding a body of knowledge powerful enough to reshape civilization.

They are the Sisterhood.

Across centuries, through the fall of empires, the burning of libraries, and the rise of modern science, the Sisterhood preserved their archive in secret, guided by a single principle.

Truth must be revealed only when the world is ready for it.

Now that responsibility falls to Dr. Gianna Braccia.

When Gia becomes the Sisterhood's newest Custodian, she inherits more than a manuscript. She inherits a decision centuries in the making. As scholars, governments, and rival factions begin to sense what has been hidden in plain sight, the delicate balance the Sisterhood has maintained for generations begins to fracture.

Because the manuscript does not merely record knowledge.

It organizes it.

Releasing what it contains could accelerate medicine, science, and human understanding in ways no one can fully predict.

Or it could destabilize the very future it was meant to protect.

Inspired by the real mystery of the Voynich Manuscript, Sisters of Twelve blends historical intrigue with speculative insight into how knowledge survives across generations.

Spanning ancient Rome, medieval scriptoria, and the silent reading rooms of modern archives, Sisters of Twelve is a sweeping historical mystery about hidden knowledge, lost manuscripts, and the women who quietly shaped the course of history.

From the author of Time Lines comes a story about the dangerous moment when history decides the world is finally ready to remember.

Some secrets are hidden to protect the past.

Others are hidden to protect the future.