The Siege of Terra series is the eight-novel finale of the Horus Heresy, picking up right after The Buried Dagger and telling the story of the Battle of Terra itself. It’s where the Heresy’s long build-up finally pays off, and it sets the stage for the Scouring.
What the siege of terra series is
It’s a direct continuation of the Horus Heresy novel line. After the 54th Heresy book, The Buried Dagger, the series was rebranded under The Horus Heresy: Siege of Terra label and moved into the final act.
The whole run covers the Battle of Terra, the climactic assault on the Imperial Palace. It’s the end of the Heresy story, not a side story, and the books assume you’ve been following along.
The books, in order
There are eight main novels, plus three novellas and one anthology. The final novel is split into three volumes, so the main sequence actually reads as ten books if you count each part separately.
The novellas slot in between the main entries and fill in side characters and moments. The anthology, Era of Ruin, came out in 2025 and closes out the label.
| # | Title | Author | Year | Type |
|---|---|---|---|---|
| 1 | The Solar War | John French | 2019 | Novel |
| 2 | The Lost and the Damned | Guy Haley | 2019 | Novel |
| 3 | The First Wall | Gav Thorpe | 2020 | Novel |
| Sons of the Selenar | Graham McNeill | 2020 | Novella | |
| 4 | Saturnine | Dan Abnett | 2020 | Novel |
| The Fury of Magnus | Graham McNeill | 2020 | Novella | |
| 5 | Mortis | John French | 2021 | Novel |
| 6 | Warhawk | Chris Wraight | 2021 | Novel |
| 7 | Echoes of Eternity | Aaron Dembski-Bowden | 2022 | Novel |
| Garro: Knight of Grey | James Swallow | 2023 | Novella | |
| 8 | The End and the Death: Volume I | Dan Abnett | 2023 | Novel |
| 8 | The End and the Death: Volume II | Dan Abnett | 2023 | Novel |
| 8 | The End and the Death: Volume III | Dan Abnett | 2024 | Novel |
| Era of Ruin | Various | 2025 | Anthology |
Why it matters
This is the payoff for years of Heresy novels. The Siege of Terra is the battle the whole series has been walking toward, so it’s where the big questions get answered.
It also bridges into what comes next. The Scouring series follows on from here, starting with Ashes of the Imperium, and picks up the aftermath.
How it connects to the wider lore
The series sits at the end of the Horus Heresy line and the start of the Scouring. If you’re reading the Heresy in order, you go from The Buried Dagger straight into The Solar War.
It’s also tied to the Primarchs books, which give background on the key figures. Those aren’t required, but they add context if you want more on a specific character before the siege.
Key facts
- The Siege of Terra series is the eight-novel finale of the Horus Heresy.
- It continues directly from the 54th Heresy novel, The Buried Dagger.
- The final novel, The End and the Death, is split into three volumes.
- The series includes three novellas and one anthology, Era of Ruin (2025).
- It’s followed by the Scouring series, starting with Ashes of the Imperium.
FAQ
Do I need to read the Horus Heresy first?
Yes, ideally. The Siege of Terra series is a direct continuation and assumes you know the characters and events from the Heresy novels.
How many books are in the Siege of Terra series?
Eight main novels, though the eighth is split into three volumes. There are also three novellas and one anthology.
What comes after the Siege of Terra series?
The Scouring series, which begins with Ashes of the Imperium and covers the aftermath of the siege.