One ancient manuscript. One hidden Key. One man willing to usher in the apocalypse. When the Gates of Hell stand ready to open, only the last of the Remnant can stop him.

When Morgan Sierra receives a mysterious package containing her late father's final letter and a centuries-old Jewish manuscript, she's thrust into a deadly hunt across Barcelona. The book is a Sefer Yetzirah—the Book of Creation—one of the earliest texts on Jewish mysticism. But this copy holds a terrible secret: the location of a Key that can open the Gates of Hell itself.

Her father's message is cryptic but urgent: "You are the last of the Remnant. Those who seek the Gates of Hell must not find the Key. To open it will usher in the Last Days."

The manuscript was sent by Santiago Pereira, an elderly Jewish stonemason and sculptor who spent his life working on Barcelona's magnificent Sagrada Familia basilica. But Santiago is found dead at the base of the tower, his body broken on the stones below—an apparent suicide that Morgan suspects is murder. Someone else is hunting for the Key, someone willing to kill to find it.

With her partner Jake Timber at her side, Morgan travels to Barcelona's ancient Jewish quarter, following clues hidden in Kabbalistic texts and carved into the very stones of the Sagrada Familia. The city's dark history of persecution echoes through every discovery—from the expulsion of 1492 to the pogroms that devastated El Call centuries before. But this isn't just about history. The Remnant has protected the secret for generations, and now Morgan is the last guardian standing between humanity and an ancient evil.

Adam Kadmon was once Santiago's most promising student, a scholar of Kabbalah who shared his teacher's passion for Jewish mysticism. But a terrible incident scarred him—body and soul—and now he leads Los Devoradores, "The Devourers." Adam believes the time has come to open the Gates of Hell, to summon the Misshapen and Polluted of God, demonic forces that will bring judgment upon a corrupt world. He will stop at nothing to find the Key, even if it means the death of everyone Morgan loves.

As Morgan deciphers her father's final message and races through Barcelona's most sacred sites, she must confront not only a deadly enemy but also her own beliefs. The psychologist who once explained away religious experiences through science now faces undeniable supernatural evil.

The Gates are real. The Key exists.

And if Adam Kadmon finds it first, the Last Days will begin.

Perfect for Readers Who Love:

• Dan Brown's Robert Langdon series (The Da Vinci Code, Angels & Demons)
• James Rollins' Sigma Force adventures
• Jewish mysticism, Kabbalah, and ancient religious secrets
• Barcelona's Gothic Quarter and the Sagrada Familia basilica
• Archaeological mysteries with supernatural elements
• Strong female protagonists
• Religious thrillers exploring faith vs. science
• Secret societies and ancient conspiracies
• Spain's hidden Jewish history
• Apocalyptic prophecies and demonic forces

Series Information:

Gates of Hell is Book 6 of the ARKANE thriller series. Each book is a complete adventure featuring Morgan Sierra, an ex-military psychologist now working for ARKANE—a secret organization investigating supernatural mysteries around the world at the intersection of religion, history, and the occult. While each book stands alone, characters and relationships develop across the series.

About the Setting:

Barcelona's Jewish history provides a haunting backdrop: the ancient synagogue hidden in El Call, the expulsion of 1492, and the magnificent Sagrada Familia basilica where Christian and Jewish symbolism intertwine. Morgan's journey takes her through Gothic alleyways, medieval quarters, and onto the soaring towers of Gaudí's unfinished masterpiece—all while uncovering secrets carved in stone by those who came before.

Themes & Content:

Gates of Hell explores Jewish Kabbalah and mysticism, the numeric mysteries of gematria, ancient manuscripts, and the power of sacred words. The novel delves into Spain's complex religious history, the persecution of Sephardic Jews, and the hidden remnants of communities that once thrived. It examines faith versus rationalism, the weight of inherited responsibility, and what happens when ancient evil threatens the modern world.

Story Details:

• Genre: Religious thriller, archaeological adventure, supernatural mystery
• Length: Novel full length
• Reading time: 6-8 hours
• Mood: Atmospheric, urgent, mystical, tension-filled
• Setting: Barcelona, Granada, Spain, Safed, Israel
• Content note: Violence, religious themes, demonic elements, references to historical persecution

A Note from the Author:

Barcelona's Jewish history is both tragic and inspiring. The ancient community of El Call was one of the most vibrant centers of Jewish learning in medieval Europe before the pogroms of 1391 devastated it. This novel honors that history while exploring the enduring power of faith, the responsibility we bear for ancient knowledge, and the thin line between the seen and unseen worlds.