Among the Ultramarines, war must be understood before it is fought. Strengths are listed, objectives defined, risks classified. Varro Tigurius is the man responsible for studying that which precisely refuses any classification: the Warp, the visions and the thoughts of enemies whose minds have nothing human.

Roboute Guilliman is often summed up in a joke: a Primarch capable of conquering the galaxy with an Excel spreadsheet! The caricature works because it contains an element of truth. Guilliman plans, classifies, delegates, measures and builds. But to reduce the Lord of Ultramar to a superhuman bureaucrat is to forget what organization means in Warhammer 40,000. In the midst of an empire that readily confuses suffering and virtue, making a road passable, feeding a planet and transmitting an…

There are Space Marines who fight for the glory of their Chapter. Others defend their home world, follow the traditions of their ancestors, or simply seek to fulfil their duty to the Emperor. The Dark Angels, however, wage a far more personal war. For ten thousand years, they have hunted men who vanished into the darkness of History, former brothers-in-arms whose very existence represents a wound the Chapter refuses to let heal.