The Sigillite: The Horus Heresy Series (Unabridged‪)‬

The galaxy is divided, but while his armies prepare for battle, the Emperor himself remains curiously absent. In his place stands Malcador - legendary Sigillite, First Lord of Terra and regent to the throne - now arguably the single most powerful man in the Imperium. Army officer Khalid Hassan reports back to the Palace after a disastrous secret mission into the wastelands of Gyptus but soon learns an awful truth about the destiny of mankind. Where do Malcador's true loyalties lie?