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Imperium / faction
The Emperor's own guard, crafted before the Space Marine Legions and standing watch over the Imperial Palace. After ten millennia of vigil they returned to open war in the Era Indomitus.
New to Adeptus Custodes? These are the most approachable entry points among its 8 books — start near the top and branch out. Below this, every Adeptus Custodes book is listed in full.
Original summaries and chronology labels generated from the same catalog powering the atlas.
Chris Wraight
A Terra-era character study of Constantin Valdor and the early Imperial power structure before the Legions dominate the timeline.
667.M30 - 999.M30
era date, medium confidence
First published 2020
Aaron Dembski-Bowden
A Terra-centered novel about the hidden war beneath the palace and the cost of the Emperor's plans.
004.M31 - 014.M31
range date, medium confidence
First published 2016
John French
A Siege of Terra installment that turns to the Titan Legions and the apocalyptic god-machine combat raging across the dying world as the Palace is besieged. It deepens the scale of the assault and the toll it takes on Terra's defenders.
014.M31 - 014.M31
approximate date, medium confidence
First published 2021
Dan Abnett
The second part of Dan Abnett's sprawling three-volume conclusion to the Siege of Terra, picking up as the assault on the Imperial Palace reaches its most desperate and surreal heights. Loyalist defenders fight a war that is no longer only physical, as the conflict bleeds into the warp and the stakes for Horus and the Emperor escalate toward their final reckoning. As a middle volume of the saga's climax, it assumes deep familiarity with the preceding Horus Heresy and Siege of Terra books.
014.M31 - 014.M31
approximate date, medium confidence
First published 2023
Dan Abnett
The final volume of Dan Abnett's epic that closes out both the Siege of Terra and the entire Horus Heresy, bringing the confrontation between the Emperor and his favoured son to its long-awaited resolution. It delivers the saga's ultimate turning point and the consequences that will shape the grim future of the 41st Millennium. This is a payoff book for readers who have followed the series to its end, not an entry point.
014.M31 - 014.M31
approximate date, medium confidence
First published 2024
Guy Haley
A Dawn of Fire continuation that leans into the spiritual and political strain of the new crusade, best read as part of the sequence.
000.M42 - 099.M42
era date, medium confidence
First published 2022
John French
Told from the unreliable perspective of the Dark Angels' most enigmatic exile, this novel follows Cypher as he and a small band of the Fallen infiltrate Holy Terra itself, pursuing a hidden agenda at the very heart of the Imperium. Custodes, Imperial Assassins, and predictive seers close in as it becomes clear his ultimate destination is the foot of the Golden Throne, leaving his true intentions a tantalizing mystery.
000.M42 - 333.M42
era date, medium confidence
First published 2023
Chris Wraight
A quiet, character-driven novella centred on Malcador the Sigillite, the enigmatic right hand of the Emperor on Terra. It explores his manoeuvring among the Imperium's power structures during the war and hints at the vast secret burdens he carries.
334.M31 - 666.M31
era date, medium confidence
First published 2013