Mortis cover art

Mortis

The Horus Heresy: Siege of Terra, Book 5

Preview
Get this deal Try Premium Plus free
Offer ends 29 January 2026 at 11:59PM GMT.
Prime members: New to Audible? Get 2 free audiobooks during trial.
Just £0.99/mo for your first 3 months of Audible.
1 bestseller or new release per month—yours to keep.
Listen all you want to thousands of included audiobooks, podcasts, and Originals.
Auto-renews at £8.99/mo after 3 months. Cancel monthly.
Pick 1 audiobook a month from our unmatched collection - including bestsellers and new releases.
Listen all you want to thousands of included audiobooks, Originals, celeb exclusives, and podcasts.
Access exclusive sales and deals.
£8.99/month after 30 days. Renews automatically.

Mortis

By: John French
Narrated by: Jonathan Keeble
Get this deal Try Premium Plus free

£8.99/mo after 3 months. Cancel monthly. Offer ends 29 January 2026 at 11:59PM GMT.

£8.99/month after 30 days. Renews automatically. See here for eligibility.

Buy Now for £5.99

Buy Now for £5.99

LIMITED TIME OFFER | £0.99/mo for the first 3 months

Premium Plus auto-renews at £8.99/mo after 3 months. Terms apply.

About this listen

Book five of the Siege of Terra

After a series of victories, the Imperial forces are on the back foot once more. The power of Chaos is rising, the Traitors gain ground, and all hope seems lost. Can Terra endure?

Listen to it because: delve back into the biggest war in Imperial history, which is getting even bigger as Traitor Titans land and the influence of the warp grows, plaguing the defenders in all sorts of vile ways.

The story: the victories of Saturnine and the sacrifices of the Eternity Wall space port have faded into the hope of yesterday. Denied but not defeated, the Traitors intensify their assault on the Imperial Palace. With the principal space ports in Horus’ hands, the Warmaster now drains the heavens of his reserves.

As the pressure of the assault increases, the power of Chaos waxes. The waking lives of the defenders are filled with despair, while their dreams pull them in search of a false paradise. As the fabric of the defences fails and the will of those who stand on them cracks, Horus commands the Titans of the Legio Mortis to breach the walls. Against them stands the might of Mercury Wall and the strength of the Legio Ignatum. Ancient rivals, the god-engines of both Legions meet in battle, while within the walls a few desperate individuals seek a way to turn back the tide of the warp’s malign influence. Across Terra, lost warriors and travellers make their way through wastelands and gardens of horror, towards home and an unknown future.

Written by John French. Narrated by Jonathan Keeble. Running time 16 hours 26 mins.

©2021 Games Workshop Limited (P)2021 Games Workshop Limited
Fiction Military Science Fiction Siege Space Exploration Space Opera Interstellar

Listeners also enjoyed...

The Solar War cover art
Fury of Magnus cover art
Sons of the Selenar cover art
Blood and Lies cover art
The Book of Martyrs cover art
First and Only cover art
Xenos cover art
Cthonia's Reckoning cover art
The Hollow King cover art
Horusian Wars: Resurrection cover art
The First Prince cover art
Sons of the Emperor: An Anthology cover art
Lupercal's War cover art
The Devastation of Baal cover art
The Carrion Throne: Warhammer 40,000 cover art
Valdor: Birth of the Imperium cover art
All stars
Most relevant
It's true that you can safely skip this book and you won't lose the overall sense of the Siege, but you'll also miss out on some rather tasty filler.

There's quite a few arcs being gathered here so it helps if your recall is good. Kudos to French for continuing the sagas of Olanious and John Grammaticus, Yesugei and even Corswain. There's recalls to the Webway war, and while one of the revelations doesn't have the impact it should (it needed a lot more threading in previous books to make it stick) it's a decent book and anyway, we know the eventual outcome.

Pick it up on Daily Deal or as a 2 for 1.

Extremely satisfying filler

Something went wrong. Please try again in a few minutes.

Another good addition to the Siege of Terra series. A well written book by John French Fantastically narrated by Jonathan Keeble.

Looking forward to the next book in the series.

Well done to both John French and Jonathan Keeble.

Out standing

Something went wrong. Please try again in a few minutes.

Another great story based on the Seige of Terra campaign of the Horus Heresy series.

5 stars

Something went wrong. Please try again in a few minutes.

I wonder if John French has a fetch for vomit. People vomited alot in this book. 10/10

Alot of vomit

Something went wrong. Please try again in a few minutes.

It's still good but one of the weakest entries in the Horus Heresy and easily the worst of the Siege of Terra series.

it progresses the story and has some massive plot points in the whole heresy but really is a let down after so many strong tales.

A weaker entry into the Horus Heresy

Something went wrong. Please try again in a few minutes.

See more reviews