The Space Marines are humanity's defenders. Warriors without peer, forged by arcane science, they are the ultimate expression of the Emperor's will and shine like a beacon of hope to all mankind. The Space Marines are humanity's defenders. Warriors without peer, forged by arcane science, they are the ultimate expression of the Emperor's will and shine like a beacon of hope to all mankind. Architect of Fate: Four linked novellas tell stories of the Relictors, Imperial Fists, Star Dragons, Blood Swords and White Consuls Space Marines as they are caught in the web of Kairos Fateweaver. As the daemon's machinations play out across the millennia, can any of the Space Marines survive? Siege of Castellax: The evil and twisted Chaos Space Marines take centre stage as the Iron Warriors fortress world of Castellax comes under siege by a massive force of savage orks. As the green tide sweeps across the world, in-fighting amongst the defenders threatens to bring them all to ruin.