In this two-book sequence, author James Swallow brings the Blood Angels Chapter to life. In an epic story of heroism, corruption and betrayal, battle-brothers Rafen and Arkio find themselves pitted against each other in a battle for the very soul of the Chapter. When Brother Arkio claims to be a reincarnation of Sanguinius, the Blood Angels' spiritual father, the message is clear: follow me or die. Rafen kneels before Arkio and swears an oath of devotion - but the words are ashes in his mouth, and in his heart, he knows that he and his brother will have a reckoning that only one of them will survive...