The frequency is real. Blake heard it in the Strahov crypt. It restructured his nervous system in a way that cannot be reversed. Now he sits in a stone cottage on the Icelandic coast, writing the account of what happened in the seventh Moleskine with a pen that shakes when he sets it down. Bilateral tremor. 111.2 Hz. Permanent.

What he is writing is both confession and instruction manual.

The Premonstratensian monks did not simply guard the frequency. They prepared for it. A fifteenth-century reading list recovered from a Charles University archive reveals twenty-three texts — Christian, Jewish, Hermetic, Islamic — required before any candidate could enter the crypt. The Ars Notoria. The Sefer Yetzirah. The Gospel of Mary. Twenty-three books to tune the mind before the frequency tuned the body.

While Blake maps the preparation protocol from Iceland, Nadia holds the Masters Foundation together from Kansas City, alone, at 5:12 every morning. She manages seventeen meetings, four grant deadlines, a Senate inquiry, a company filing patents on the research she is trying to keep free, and the slow irreversible transformation of a marriage into an interference pattern between two frequencies that are half a hertz apart.

Blake's measurements have found something no one expected. He takes a spectrum analyzer into the cathedrals and the stone answers in the same narrow band as the crypt — Chartres at 108 Hz in the nave, generated not by its height but by its width. Andrew's models say it was never engineered to. Cathedral acoustics are emergent, the inevitable consequence of what stone and space do to sound, and only the Strahov specifications made it intentional. Which is the stranger answer.

The preparation is not about the frequency. The preparation is about the organism that will receive the frequency.

Twenty-three candidates are waiting.

Not ready to buy? Read the opening chapters free.

Paperback Edition
Retail Format · Trade Paperback
ISBN: 9798998264528
Page Count: 292 pages
Orderable from any bookstore by ISBN
Hardcover Edition
Jacketed Hardcover · Case Laminate
ISBN: 9798998264535
Page Count: 248 pages
Orderable from any bookstore by ISBN
Publication Details
AuthorJason Carroll Holloway
PublisherSeventh City Press
SeriesMasters X Vol. 2
LaminateMatte
InteriorB&W · Creme paper
Ebook ISBN9798256009625
Digital Edition
Available as an ebook in Masters X: The Complete Novel (Kindle, $12.99). The individual volumes are print-only.
Ebook: all three volumes in Masters X: The Complete Novel on Kindle — $12.99
acoustic frequencyArs NotoriaChartres cathedralgrimoireIcelandliterary thrillerpreparation protocolresonancetremor
The Real History
The real places and texts behind this volume. The events the novel sets in them are fiction:
All Field Notes

Do I need to read Volume I before The Grimoire?

Yes. The Grimoire picks up immediately after the events of The Inheritance of Frequency and assumes full knowledge of the first volume's revelations.

What is the Ars Notoria, really?

The Ars Notoria is a real thirteenth-century Solomonic manuscript, available in institutional collections worldwide. It uses geometric figures called notae and structured prayers to develop memory and eloquence. The Grimoire's fictional reading is that the notae are interfaces — cognitive technology, not magic. Read the full history in the Field Notes.

Is Chartres Cathedral's acoustics real?

Cathedral acoustics are a real and documented field. The specific frequency relationships in the novel are its fictional architecture, built on real acoustic research into medieval sacred spaces.

Where can I buy The Grimoire?

Available as an ebook in Masters X: The Complete Novel (Kindle, $12.99). The individual volumes are print-only. Hardcover and paperback editions are sold direct from the publisher via IngramSpark when orderable; see the edition links on this page.