Many are the sagas of Leman Russ, Lord of Winter and War, most fearsome of the Emperor's primarch sons. At the height of the Great Crusade, his Space Wolves fight to bring the rebel world of Dulan to compliance. Enraged by the defiance of the tyrant Durath, Russ has pledged to strike him down personally - but his brother Lion El'Jonson of the Dark Angels advises more caution. With the might of two Legions arrayed against Durath, tensions nevertheless run high, and the rivalry between the Wolf and the Lion threatens to engulf them all.

The Dark Angels and the Night Lords fought one another to a bloody stalemate during the Thramas Crusade and, though the Lion eventually claimed victory, it left both Legions scattered and under-strength. Jago Sevatarion, First Captain of the Night Lords, languishes in a gaol cell in the heart of Ultramar. Far from a spent force, the Night Lords must consider where their loyalties lie, and what path they will take in the days and months to come.

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? 

Chagrined by his defeat at the hands of Jaghatai Khan, Mortarion abandons the pursuit of the White Scars and instead leads the Death Guard in a spiteful, punitive rampage across the systems of the Prosperine empire. World after world has fallen to this horrific onslaught, and yet the insular and secretive primarch seems preoccupied by some other unspoken goal. Finally, on Terathalion, the truth of Mortarion's sinister heritage will be exposed, and the future of the XIV Legion will be written....

Paralysed by the continued ork invasion of Imperial space, the rulers of Terra continue to fight among themselves. Finally losing patience with the High Council, Koorland - the last surviving Imperial Fist - ousts the Lord Commander and seizes control. Elsewhere, the Fists Exemplar are forced by circumstance to fight alongside the Iron Warriors. Where will such an alliance lead - can a Traitor Legion ever be trusted?

Shortly after the shameful events of Monarchia, the Word Bearers Legion have begun to prosecute the Great Crusade with a previously unseen level of zealotry and aggression. The world of Forty-Seven Sixteen falls into their sights, a world where the human populace worship graven idols in their heathen rights and yet plead to be integrated into the wider Imperium.

On a distant world of the Imperium, an agent of Rogal Dorn finds himself the prisoner of a Legion whose loyalties may be divided. Shackled and bound, the former Luna Wolf must fight a battle of wits with his captor, lest the course of the Horus Heresy take an unexpected turn. Will his very presence drive his erstwhile allies into the arms of the Warmaster, or will maintaining the status quo prevent another Legion from turning traitor? And just who is the mysterious Space Marine aiding him from the shadows?

From out of the shadows of the Silent War, a hero emerges. Clad all in grey, an errant warrior of the Legiones Astartes kneels before the Regent of Terra, and accepts a solemn new duty - Battle-Captain Garro, once commander of the Eisenstein, now Agentia Primus of Malcador the Sigillite. From the desolation of Isstvan to the halls of the Imperial Palace itself, he stands as a paragon of loyalty and protector of the innocent, ever ready to strike back at the traitorous allies of the Warmaster.

The Sisters of Battle are the Emperor's most devout worshippers, fierce warriors preaching the purity of the Imperium and scourging their enemies with bolter and flamer. On a distant world, the Ecclesiarchy outpost of Sanctuary 101 was wiped out by an implacable foe - the fearless, soulless necrons. Now, a mission of the Sisterhood has returned to reconsecrate the site - but the metallic nightmares still lurk in the darkness, guarding a secret that has lain dormant for millennia. 

Of all the Emperor’s sons who fell to Chaos, it is perhaps Magnus the Red whose tale is the most tragic. Sanctioned because of his desire for knowledge, chastised, judged, and shattered to his very elements – there is much for the Crimson King to feel vengeful for. Yet revenge is not the only thing that draws him to Terra alongside the Warmaster’s besieging armies. He seeks something, a fragment, the missing piece of himself that lies within the most impregnable place on the planet – the inner sanctum of the Imperial Palace.

After a long and gruelling conflict, the traitors at last close upon Terra. But time is dwindling for an attack. Both Guilliman and the Lion are returning with all haste, and their armies could turn the tide. The hosts of the Warmaster must unite, for only then can they attack the Throneworld itself. While Mortarion is sent on ahead as the fleet’s vanguard, it falls to Lorgar and Perturabo to marshal Fulgrim and Angron, both now elevated to daemonhood and perhaps beyond even the will of the Warmaster to command.

The Shattered Legions crew of the Sisypheum, broken and at the end of their endurance, find themselves divided - torn between following their resurrected captain on a suicidal mission or obeying orders to return to Terra and rejoin their Legion brothers. Following a series of garbled messages intercepted by the Kryptos, the divided warriors descend to the shattered surface of Luna. Here, their bonds of loyalty, duty, and their devotion to one another will be tested as ancient horrors of the earliest days of gene-manipulation are unleashed, and a long-buried secret is revealed.

With the Dark Angels spread across a hundred systems, primarch Lion El'Jonson stands as Lord Protector of Ultramar - though his true motives are known to few indeed, and old rivalries on the home world threaten to tear the Legion in half. But when word comes of the Night Lords' attack on Sotha, the Lion's brutal actions bring Imperium Secundus once again to the brink of civil war.

For too long had the Vth Legion ranged out beyond the sight of the wider Imperium, remaining ignorant of the Warmaster's rebellion and the war that inevitably followed. Only once their primarch, Jaghatai Khan, had satisfied himself that the path before them was just and true did the White Scars choose a side, taking the fight to the traitors on every front.

The Black Ships are a mysterious and fearful sight - unmarked vessels that scour the distant reaches of the galaxy, ever watchful for latent psykers and witchbreeds for the monolithic Astra Telepathica. When one such ship, the Validus, is found drifting unpowered in the nightmare realm of the warp, it falls to the Sisters of Silence to uncover the reason behind it. As pariahs capable of blocking even the most potent psychic energy, Amendera Kendel and young Leilani Mollitas ready themselves for the worst....