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 William Masters Foundation together from Kansas City, alone, at 5:12 every morning. She manages seventeen meetings, four grant deadlines, a Senate inquiry, a pharmaceutical industry's sabotage campaign, and the slow irreversible transformation of a marriage into an interference pattern between two frequencies that are half a hertz apart.

Andrew Chen's algorithm has identified something no one expected. The mathematical relationships the medieval masters encoded in cathedral proportions — the nave heights at Chartres, the transept ratios at Reims — are not decorative. They are acoustic specifications. The cathedrals are instruments. They were always instruments.

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

Twenty-three candidates are waiting.

Not ready to buy? Read the opening chapters free.

Paperback Edition
Retail Format · Trade Paperback
ISBN: 9798256009953
Page Count: 260 pages
Orderable from any bookstore by ISBN
Hardcover Edition
Jacketed Hardcover · Case Laminate
ISBN: 9798295812675
Page Count: 218 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
Kindle on Amazon ($6.99). EPUB on Google Play Books (ISBN above). Same manuscript; Kindle uses a separate cover and ASIN.
acoustic frequencyArs NotoriaChartres cathedralgrimoireIcelandliterary thrillerpreparation protocolresonancetremor
The Real History
Every place and document in this volume is real. Read the documented history:
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 the trilogy's fictional architecture, built on real acoustic research into medieval sacred spaces.

Where can I buy The Grimoire?

Kindle on Amazon ($6.99) or EPUB on Google Play Books. Hardcover and paperback editions are sold direct from the publisher via IngramSpark and can be ordered from any bookstore or library by ISBN. See the edition links on this page.