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From Warhammer 40k - Lexicanum
→Overview
Believed to have been at least partially originally authored by [[Malcador the Sigillite]]{{Fn|5}} [[Inquisitors]] of the [[Ordo Malleus]] are also known to posses copies of the book. While it may appear to be a normal book, opening it will reveal a series of flickering paper-thin screens that contain interactive information that can be brought to focus or enlarged. Page after page discusses tactics and how to fight the denizens of the [[Immaterium]], as well as, listing the [[True Name]]s of a great many [[Daemonic]] entities; information collected from the [[Librarium Daemonica]], the repository of dangerous knowledge pieced together by the Ordo Malleus over the millennia. The book pulls no punches; it includes an extensive discourse of when to terminate compromised allies and a whole chapter discussing the moral implications and appropriate use of [[Exterminatus]].{{Fn|2}}
Each Grey Knight fights with a copy of the book displayed in a beautifully decorated [[ceramite]] case fastened to his breastplate or hanging from a chain around his neck.{{Fn|4a}} It contains exactly 666 words.{{Fn|3b}} The book is also represented in Grey Knight iconography, on the chestplate and pauldron of both [[power armour]] and [[Terminator Armour]]. It is a symbol of the greatest weapon against the forces of [[Chaos]] - an unshakable faith in the [[Emperor of Mankind]].{{CME}}
===Domina Liber Daemonica===
The '''Domina Liber Daemonica''' is a variation of the book by the [[Grey Knights]], a tool that can be as vital to vanquishing Daemons as blade or bolter. The Domina Liber Daemonica is a relic of [[Supreme Grand Master]] [[Janus]], the only Grey Knight to ever master all 666 words of banishment, each one painstakingly recorded on its pages.{{Fn|3a}} In times of need, a hero of the Chapter will carry the Domina Liber Daemonica into battle and the book's bindings crackle with arcane energy, as its words of banishment send Daemons
howling back into the Warp.{{Fn|4b}}
==See also==
