The Grimoire Nostramo is a legendary book and a relic of the forces of Chaos that was authored by the Night Lords Traitor Legion's Primarch, Konrad Curze. The tome is named after Curze's homeworld of Nostramo.
The volume explained how best to use terror as a weapon against one's foes, and is said to have been written in the blood of all the kings slain by the hand of the Night Haunter.
- Imperium Nihilus - Vigilus Defiant (8th Edition), pg. 172
- Codex Heretic Astartes - Chaos Space Marines (8th Edition) (Revised Codex), pg. 92