Book One of The Hidden Portals Trilogy
When Heaven
Was Open
Portals, Giants, and the Antediluvian World
M. Dustin Brimberry
Foreword by Pastor Troy Brewer
328 pages • Paperback • eBook • Audiobook
About the Book
Why do 500 cultures on six continents tell strikingly similar stories about giants who once ruled the earth, portals between realms, and a catastrophic flood that ended the old world? The convergence is staggering — and it cannot be explained by coincidence or cultural borrowing. These stories preserve the memory of something real.
They remember. Not perfectly — how could they after millennia of oral transmission, cultural adaptation, and deliberate suppression? But they remember. The giants lived above. The doors were open. Then they closed. The pattern persists across language families, continents, and centuries because the events themselves left an impression deep enough to survive.
This is the book Michael Heiser readers have been waiting for. Building directly on the divine council framework and the two-tier supernatural worldview of the Hebrew Bible, When Heaven Was Open argues that Genesis 6 is not mythology — it is history. The Watchers breached heaven-earth portals at Mount Hermon. The Nephilim were their offspring. The Flood sealed the breach. And every myth, ziggurat, and sacred mountain ever built points back to what the ancient world still half-remembered.
What You Will Learn
Why global flood and giant traditions cannot be explained by coincidence or cultural diffusion
What the Hebrew phrase benei ha-Elohim (sons of God) actually means in its ancient Near Eastern context
How Eden functioned as a cosmic portal — a temple where heaven and earth intersected under God's terms
Why the Watchers' descent at Mount Hermon was a deliberate assault on heaven-earth access
What 1 Enoch preserves that canonical Scripture assumes its readers already knew
How the Flood functioned not merely as judgment, but as a divine sealing of unauthorized portals
Inside the Book
Part I
The Global Echo
What the World Remembers
Chapters 1–4
- — The Beanstalk as Fossil
- — Ladders, Giants, and the Theft from Heaven
- — From Temple to Nursery — How the Sacred Became Simple
- — Why Myths Survive
Part II
The First Breach (Eden)
The Original Architecture and the First Rebel
Chapters 5–6
- — The Garden Temple — Eden as Cosmic Portal
- — The Nachash and the Council
Part III
The Second Breach (Hermon)
The Rebellion, the Offspring, and the World That Required a Reset
Chapters 7–12
- — When Heaven Was Open — The World the Myths Remember
- — The Sons of God Identified
- — The Nephilim — Identity and Violence
- — The Antediluvian World
- — The Second Temple Witness
- — Mount Hermon — The Axis Mundi Revealed
Appendix A
Reading 1 Enoch
Reliability and Relevance
- — Textual history and dating
- — Dead Sea Scrolls evidence
- — Early Christian reception
- — How to read it today
Appendix B
The Giant Traditions
A Global Catalog
- — Ancient Near East
- — Mediterranean & Norse
- — British Isles & Americas
- — Pattern synthesis
From the Pages
"Adam was not a gardener. He was the first priest. Eden was not a nature reserve. It was the original sanctuary — the cosmic temple where heaven and earth met under God's authorized terms."
— Chapter 5: The Garden Temple
"The fairy tales remember. Not perfectly — how could they after millennia of oral transmission, cultural adaptation, and deliberate suppression? But they remember. The giants lived in the sky. They hoarded treasures. They ate humans. And brave heroes climbed impossible heights to defeat them."
— Chapter 1: The Beanstalk as Fossil
"Mount Hermon's very name whispers its secret. In Hebrew, cherem means 'devoted to destruction' — the same word used for objects so defiled by association with false gods that they must be utterly destroyed."
— Chapter 12: Mount Hermon — The Axis Mundi Revealed
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