For readers who loved Foucault's Pendulum and wished it moved like a thriller - and for readers of The Historian who came for the archive itself. In Kansas City's Miller Nichols Library, a fired security guard named Blake Masters is reading Umberto Eco's novel for the fourth time when a safety deposit box his grandfather paid for fifty-seven years in advance finally reaches him. Inside: seven leather notebooks. Thirty years of classified acoustic research. And a cross-reference to a sealed crypt beneath Prague's Strahov Monastery. What follows is a single story told across three volumes - The Inheritance of Frequency, The Grimoire, and The Kingdom - from a Bohemian scriptorium in 1267 to the limestone chambers of SubTropolis beneath Kansas City, from an Icelandic cottage at the foot of Mýrdalsjökull to the Volta Region of Ghana. At its center: three real manuscripts that should not be connected - the Voynich Manuscript, the Ars Notoria, and the Codex Gigas - and a frequency, 111.2 Hz, that archaeoacoustic researchers have measured in stone chambers on four continents. The history is documented. The manuscripts are real. The fiction begins exactly where the record runs out. This omnibus edition collects the complete trilogy in one volume - 686 pages hardcover / 734 pages paperback - one order, one story, no waiting between volumes. "Some signals you pick up by accident. Some are aimed at you."