Soon after word reached Terra of Horus’s nascent rebellion, Mars fell. Rogue elements within the Mechanicum priesthood, stirred by the Warmaster’s promises of independence and prosperity, turned against the Imperium and forced the primarch Rogal Dorn to order an impenetrable blockade of the Red Planet. Now it has become clear that the corruption has spread too deep, and that more drastic measures must be taken if the Forge World Principal is to be reclaimed. Calling upon the expertise of those who witnessed the so-called ‘Death of Innocence’ firsthand, Lord Dorn and Malcador the Sigillite consider their final solution – the complete extermination of all life on Mars. The Horus Heresy returns to the Solar System… No, we’re not at that battle quite yet. But what are the lords of Terra going to do about Mars…? Cybernetica delves into some of the darkest secrets of the Mechanicum and shows the lengths to which the Imperium is willing to go – and the rules they are willing to break – to exterminate the traitors. Contained in a full colour wrap around dust jacket, over a clockwork hardcover, this new limited edition is every centimetre a Horus Heresy collectors item. On the first page of your book, you'll find a signature from author Rob Sanders, as well as the unique number of your copy. Also included is a fold-out colour section, featuring new artwork and background, as well as a full four-page spread of the Cybernetica cover art. Every page is gilt-edged and a bronze marker ribbon completes the package.

As the flames of treachery spread throughout the Imperium, Horus plots to subvert or destroy all those who would stand against him. On Mars, home world of the Mechanicum priesthood, the great manufactory-cities have long produced much of the weaponry required for the expeditionary fleets across the galaxy - making the world invaluable to whoever controls it in the coming war. Now, the Warmaster's agents begin to stoke the fires of rebellion, turning the loyalist forges and the mighty Titan Legions against one another. And, with whispers spreading of an ancient terror lurking beneath the Red Planet's surface, the Dark Mechanicum rises...

A Horus Heresy short story In the forges of Lukas Chrom, something sinister has come into being. Rumours abound of forbidden lore and artificial sentience, and a name has been whispered in the dark corners of the Martian data network: 'Kaban'. READ IT BECAUSE It's a prequel to Mechanicum which explains the origins of the mysterious intelligent machine that causes havoc on Mars... THE STORY The Mechanicum priesthood guards its secrets carefully - few of its technological marvels and processes are fully understood by the Imperium, and many more could be deadly if allowed to fall into the wrong hands. However, in the forges of Lukas Chrom, something sinister has come into being. Rumours abound of forbidden lore and artificial sentience, and a name has been whispered in the dark corners of the Martian data network: 'Kaban'. This story also appears in Shadows of Treachery, book 22 of the Horus Heresy series.

A Horus Heresy short story As the Horus Heresy reaches Ultramar, Captain Ventanus of the Ultramarines must test his primarch's tactical genius against the most terrible of foes: other Space Marines. READ IT BECAUSE The first glimmerings of the Codex Astartes take shape as the Ultramarines begin to practice tactics that can be adapted to fit any foe. And Guilliman puts pen to paper and writes two words that will change the shape of the Heresy... THE STORY Roboute Guilliman has put the finishing touches to his great work - the Codex Astartes. This tome will show his Ultramarines how to deal with any tactical situation, no matter the foe. But as the Horus Heresy reaches Ultramar, Captain Ventanus of the Troublesome Fourth must test the strictures of the Codex Astartes against the one foe that the primarch never expected: other Space Marines. A short story from the Age of Darkness anthology.

A Horus Heresy novel Unaware of the wider Heresy and following the Warmaster’s increasingly cryptic orders, Roboute Guilliman returns to Ultramar to muster his Legion for war against the orks massing in the Veridian system. READ IT BECAUSE It's the beginning of one of the Horus Heresy's most infamous and epic battles. Dan Abnett's story grabs you by the shoulders and throws you into the midst of the Betrayal at Calth. The moment when the build-up ends and the battle begins is breathtaking and brutal and the rest of the novel doesn't let up. THE STORY Unaware of the wider Heresy and following the Warmaster's increasingly cryptic orders, Roboute Guilliman returns to Ultramar to muster his Legion for war against the orks massing in the Veridian system. Without warning, their supposed allies in the Word Bearers Legion launch a devastating invasion of Calth, scattering the Ultramarines fleet and slaughtering all who stand in their way. This confirms the worst scenario Guilliman can imagine – Lorgar means to settle their bitter rivalry once and for all. As the traitors summon foul daemonic hosts and all the forces of Chaos, the Ultramarines are drawn into a grim and deadly struggle in which neither side can prevail.

A Horus Heresy novel As Horus deploys his forces, a small band of loyal Space Marines from disparate Legions learn that a massive enemy armada is heading to Ultramar, home of the Ultramarines, headed by the most destructive starship ever constructed. READ IT BECAUSE A group of heroes who know there is no glory for them come together to strike a blow against the traitors. It's a classic tale of a a handful of brave warriors against a mighty foe, and it doesn't get much mightier than the Furious Abyss... THE STORY Now that news of Horus's treachery is in the open, a time of testing has come. Some Legions have already declared their allegiance to the Warmaster, while the loyalty of others lies firmly with the Emperor. As Horus deploys his forces, a small band of loyal Space Marines from disparate Legions learn that a massive enemy armada is heading to Ultramar, home of the Ultramarines, headed by the most destructive starship ever constructed. Unless they can intercept the fleet, and destroy the mighty battleship the Furious Abyss, the Ultramarines may suffer a blow from which they will never recover.

After the destruction of Monarchia and the Emperor’s reprimanding of the Word Bearers Legion, the primarch Lorgar spent many long years searching the stars for the universal truths of the cosmos – when he finally came to gaze deep into the Eye of Terror, with grim inevitability he found that the Eye stared back. Now, guided by the daemon Ingethel, he undertakes a spiritual journey into the heart of Chaos itself and sees that the entire destiny of mankind and the Imperium could rest upon just a few nexus events. As the Great Crusade burns itself out in treachery and deceit, Lorgar weighs the cost of his ambitions, and sets his course for eternal damnation.

Amidst the galaxy-wide war of the Great Crusade, the Emperor castigates the Word Bearers for their worship. Distraught at this judgement, Lorgar and his Legion seek another path while devastating world after world, venting their fury and fervour on the battlefield. Their search for a new purpose leads them to the edge of the material universe, where they meet ancient forces far more powerful than they could have imagined. Having set out to illuminate the Imperium, the corruption of Chaos takes hold and their path to damnation begins. Unbeknownst to the Word Bearers, their quest for truth contains the very roots of heresy…