Tenney, Jack B.; Zion's Trojan Horse
Unknown
Day, Donald; Onward Christian Soldiers (1942)
Nations
Yakobson & Alexander & Gat & Azar
A COMPANION TO AMERICAN MILITARY HISTORY
Horus Rising: The seeds of heresy are sown
Dan Abnett
The Horus Heresy (1)
Galaxy in Flames: The heresy revealed
Ben Counter
The Horus Heresy (3)
False Gods: The heresy takes root
Graham McNeill
The Horus Heresy (2)