Codex: Imperial Agents delves deeply into the murky origins of these clandestine organisations, offering insight into their methods of war. This also includes the mysterious Deathwatch Chapter of Space Marines, seconded as they are to the Ordo Xenos, and other key units attached to various agencies, including the Sisters of Battle, Grey Knights, Imperial Navy, Adeptus Arbites, and more. You'll find loads of grim and sinister artwork to inspire you, along with beautiful galleries of painted miniatures. This hallowed tome gives you all the rules you'll need for engaging in the shadow war for the heart of the Imperium, whether it's in Combat Patrol, narrative Crusade campaigns, or matched play games of Warhammer 40,000.