The Hildegard Prophecies
Eight centuries ago, she saw how it ends.
Eight centuries ago, Hildegard of Bingen saw seven periods that would lead humanity toward Armageddon. The prophecy was hidden. Now the Keys are turning — in our times.
Begin here · Book One
The Hildegard Prophecies
Book One of an Epic Historical Saga
Originally published as Of Mercy & Of Death
A forgotten prophecy. A murdered father. A destiny that will span generations.
The First Key begins to turn in 1917 when the Virgin Mary appears to three shepherd children at Fatima, Portugal. But was there another secret, one hidden from the world and guarded through the centuries?
The Seven Keys
Seven visions. Eight centuries. One unfolding sequence.
- Turning
The Fifth Key
- Book 3 — Deception
- Book 4 — Revelations
- Book 5 — The Besieged
- Book 6 — Signs
- Books 7–9 — Satan's Brew · Purgatory · Hell
- Locked
The Sixth Key
- Books 9–10 — Hell · Lucifer
- Locked
The Seventh Key
- Book 11 — Armageddon
Reading order
The series so far
Available nowBook 2 · 2020
Love & Betrayal
Where there is love—there is always betrayal.
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Available nowBook 3 · 2021
Deception
Where there is evil—there is always deception.
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Available nowBook 4 · 2023
Revelations
Hildegard’s prophetic Keys turn, shocking a church and world with many . . . Revelations.
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Available nowBook 5
The Besieged
In the spring of 2005, “God’s Rottweiler” is elected pope and the medieval prophecies continue to be shaken.
Read more5 novels available now. 11 titles announced in total.
The next Key · Coming November 28, 2026
Signs — Book Six
The sixth novel in The Hildegard Prophecies arrives on November 28, 2026. Join the list and you will know the moment it is available.
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A Reader’s Guide
Eight centuries ago, she saw how it ends. This free Reader's Guide opens the world of “The Hildegard Prophecies” — Hildegard's Seven Keys, the people who guard them and the road to Book 6, Signs. Enter your name and email to unlock the free 8-page guide.
What readers say
“A conspiracy thriller done right.”
“The writing is imaginative, clear and the themes well developed. Vivid imagery adds depth to the narrative. An ambitious, complex and interesting story.”
“Dupuis pits dark forces against the Nazarene Church in this swiftly paced first installment in The Seven Keys of Hildegard series. Dupuis skillfully blends religious intrigue, action, and thrills of a chase, his worldbuilding vivid, and he creates some genuine…”
“David Dupuis has gone where few tread in his historical novel series. It takes readers into a Catholic world of politics, betrayal, superstition, seduction, prophesy and ritual, a world existing somewhere deep within the “fallen stars” struggling to get back t…”
The author
A psychiatric nurse, a hockey biographer, and a forty-year obsession with a prophecy.
David Dupuis was born and raised in Penetanguishene, Ontario. A psychiatric nurse for thirty-five years, he began writing with a hockey journal in his teens and was publishing local history by 1989. His acclaimed hockey biographies include “Sawchuk” and “The Red Kelly Story,” winner of the 2016 Ontario Speakers’ Book Award. The sudden death of Pope John Paul I in 1978 sparked a forty-year fascination with papal history and prophecy that culminates in The Hildegard Prophecies. David lives near Penetanguishene with his companion Susan.