Warhammer 40,000: Dark Imperium - Guy Haley

Dark Imperium by Guy Haley is a landmark novel that reshapes the future of the Warhammer 40,000 universe.

Set in the aftermath of the Great Rift’s opening, the galaxy is split in two and the Imperium of Man stands on the brink of collapse. Into this chaos returns Roboute Guilliman, Primarch of the Ultramarines, resurrected to lead humanity through its darkest hour. As Lord Commander of the Imperium, Guilliman launches the Indomitus Crusade, seeking to reclaim lost worlds and restore order to a fractured empire.

Opposing him is the relentless corruption of Chaos, embodied by the Death Guard and their patron god Nurgle. As war rages across plague-ravaged battlefields, Dark Imperium explores not only titanic conflict, but also the philosophical and moral struggle of preserving humanity in an age where hope itself is under siege.

Main Themes

• The rebirth of the Imperium in a broken galaxy
• Leadership, duty, and the burden of command
• Chaos corruption and the power of decay
• Faith, reason, and survival
• War on a galactic, existential scale

Why You Should Read This Book by Guy Haley

• The essential starting point for the modern Warhammer 40,000 era
• Features the return of Roboute Guilliman
• Epic battles combined with deep political and moral themes
• Ideal for both new readers and long-time Warhammer fans
• Written by one of the franchise’s most respected authors

Dark Imperium is a bold and defining Warhammer 40,000 novel that ushers the setting into a new age of war, despair, and fragile hope. With sweeping scope, rich lore, and compelling character work, Guy Haley delivers a must-read story that sets the tone for the future of the Imperium and the endless conflict that defines the grimdark universe.