The definitive guide to the enemies of the Imperium. The shadowy tendrils of corruption, malevolent cults and dark gods reach deep into the very fabric of the Imperium, twisting and subverting countless human souls in an endless thirst for power. Whether it is the lure of false truths, the adoration of the alien or the deceit and guile of the Daemon, this mighty tome details the myriad of cults, secret societies and powerful personalities who hide in the dark spaces of the Calixis Sector. From opposing Inquisitorial factions to Calixis most wanted, here are all manner of threats and crimes that acolytes of the Inquisition can investigate and hunt-down in their service to mankind.