Though the Word Bearers' attack on Calth and the subsequent Shadow Crusade into Ultramar are but a memory, the borders of Imperium Secundus are far from secure. Sergeant Aeonid Thiel, stranded on the garrison world of Oran on his way back to Macragge, frustrates his superiors once again by pointing out the holes in their defence - traitor warband activity is increasing, and a series of key listening posts have fallen silent.

In the depths of Calth's arcology network, the Underworld War has raged for years. Aeonid Thiel, previously an honoured sergeant of the Ultramarines, once again finds himself in trouble. Pitted against the daemonic forces of the Word Bearers, he has no choice but to venture back to the ravaged surface and brave the deadly solar flares that have scoured all life from this world.

The Inner Walls are breached. Traitor vanguards tear towards the heart of the Palace, sensing victory. Desperate gambits are attempted: an unwilling saint is released into the ruins, as well as an enthusiastic sinner. A black sword rises, forged from spite, ready to create a legend. But amid the slaughter, Jaghatai Khan, Warhawk of Chogoris, prepares to launch the most audacious strike of the conflict. His goal is nothing less than the liberation of the Lion's Gate space port. 

Lieutenant Xedro Farren is a Primaris Marine, stronger and more adept than even the Space Marines his brotherhood is sent to fight alongside. As the Dark Angels and the Primaris Marines fight a trauma-scarred force of T’au hellbent on destroying their former allies, the true quarry becomes clear - the shadowy instigator of a psychic curse that could plunge a string of Imperial planets into madness. As worlds burn in the fires of battle, an unthinkable pact is struck, with the Primaris Marines peeling back layer after layer of deceit to find the appalling truth. 

A shuttle returns to the Solar System bearing the sole survivor of a traitor attack - however, delirious and so close to death, his tale remains untold. Ison of the Knights Errant, formerly a Librarian of his Legion, delves into the mind of the warrior, and the truth of it will chill him to the core....

Before the Warmaster's betrayal, the primarchs and their Legions were a warrior brotherhood without equal. At Calth, a planetary jewel in Ultramar's crown, a great mustering is taking place. Two proud Legions gather in hopes of healing the discord after the notorious shaming of the Word Bearers at Monarchia. Captain Alcaeus of the Ultramarines plans on joining the muster but will not rest until the remnants of the Ghaslakh Empire are purged utterly from the galaxy, For honour and glory, he has sworn an oath to succeed. 

Ciaphas Cain's latest mission takes him and his Valhallan regiment to the planet of Adumbria to defend against an approaching Chaos invasion. However, infighting with fellow Imperial Guard regiments from the world of Tallarn, commanded by an old 'friend' of Cain's from the Schola Progenium and the uprising of a sinister cult on the planet puts paid to any hopes of an easy life.

Nathaniel Garro - loyalist Death Guard, and hero of the Eisenstein - has found a new calling in his service to the Emperor. Surrounded by a cloak of secrecy, Garro travels the galaxy in pursuit of his new goal. His quest will lead him to heart of the most destructive warzones and reveal a secret that will change the course of the Horus Heresy itself....

After bringing warning of Horus' treachery to Terra, Nathaniel Garro bade a solemn farewell to his Death Guard brethren and was set upon a more noble path than he ever could have imagined for himself. Now, an old comrade returns - Meric Voyen, once an Apothecary of the XIVth Legion, carrying a deadly cargo within the boundaries of the Solar System.

On Periremunda, the populace are rioting. With local forces unable to contain the widespread civil disorder, Commissar Cain and his regiment of Valhallans are called in to help. However, it seems there is more to the rebellion than first appeared, and Cain suspects sinister forces at work behind the scenes. When the commissar is reunited with Inquisitor Amberley Vail, it seems his fears are realised. In this the fifth book in the popular Ciaphas Cain series, our hero is thrown into a deadly conspiracy that even he might not be able to emerge from alive.

On the world of Axonar, a squad of Blood Angels Scouts scale the dizzying heights of a mighty hive city as their battle-brothers fight far below. Their objective: to open the way for a daring aerial assault that will crack open the city and ensure victory.

For more than 200 years, the armies of the Emperor of Mankind fought to reconquer the galaxy - led by the superhuman primarchs, the Space Marine Legions brought countless worlds back under the rule of ancient Terra. Now Horus, once honoured Warmaster and favoured son of the Emperor, has been corrupted by the whispered promises of Chaos. At his command the Imperium is torn apart by a terrible and bloody civil war, the likes of which the galaxy has never seen....

When the twisted Dark Mechanicus priests of the Bloodborn descend upon Quintarn, the Ultramarines are quick to move in defence of their prized agri-world. However, it soon becomes apparent that the planet's fate will not be decided by the massed battle companies of the Space Marines but by the actions of just one lowly sergeant - Torias Telion.

Nathaniel Garro, knight errant and agent of the Sigillite, returns from the battlefields of Calth to find a new mission already waiting for him - a ragged fleet of Space Marines from several Legions lingers at the edge of the Terran system. With the presence of World Eaters and Emperor's Children causing concern among the loyalist defenders and drawing a grim parallel with his own frantic flight, Garro must look beneath the obvious if he is to determine friend from foe....

Ultramarines sergeants Sicarius and Numitor spearhead an assault on a tau-held world. As they clash with powerful tau battlesuits, the two sergeants discover that the Tau Empire and the Imperium of Man may have as many similarities and differences - but does that matter when the xenos threaten the Emperor's realm?