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Dark Imperium (Paperback)
The first book of the Dark Imperium trilogy
Roboute Guilliman and Mortarion clash in the battle for Ultramar
Written by Guy Haley
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Dark Imperium — The dawn of the Plague Wars
The Indomitus Crusade has brought a fragile spark of hope to a galaxy torn in half by the Great Rift. Now, Roboute Guilliman — Primarch of the Ultramarines and Lord Commander of the Imperium — turns his gaze toward his home. But Ultramar is under threat. Mortarion, Daemon Primarch of the Death Guard, advances with relentless malice, spreading plague, despair, and corruption across Guilliman’s realm. As worlds fall and faith falters, the Primarch must lead his armies — including the newly forged Primaris Space Marines — into a conflict where even victory may come at a terrible cost.
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Dark Imperium launches the epic saga of the Plague Wars, charting the clash between two legendary brothers reborn on opposite sides of the war for humanity’s future. While Guilliman struggles to rebuild a shattered Imperium, Mortarion’s blighted legions ravage Ultramar in the name of Grandfather Nurgle. Ancient rivals, sinister daemons, and political intrigue converge as hope and ruin collide on countless battlefields.
This gripping novel explores loyalty, faith, and destiny in a galaxy overwhelmed by darkness — and sets the stage for one of the most defining conflicts of the Warhammer 40,000 era.