Believing Terra has already fallen to the Warmaster, Primarch Roboute Guilliman founds the Imperium Secundus.
Far out on the Eastern Fringe, the realm of Ultramar stands alone. Having weathered the Word Bearers’ attack on Calth and the subsequent Shadow Crusade against the Five Hundred Worlds, the Ultramarines primarch Roboute Guilliman now draws all loyalist forces to Macragge as he contemplates a new future for mankind. With the arrival of more and more fugitives from the war that has engulfed the rest of the galaxy, all distinction between friend and foe is lost – isolated from Terra by fearsome warp storms, is Guilliman making a bid for power to rival even the renegade Warmaster Horus?
Dan Abnett (born 1965) is a British comic book writer and novelist. He has been a frequent collaborator with fellow writer Andy Lanning, and is known for his work on books for both Marvel Comics, and their UK imprint, Marvel UK, since the 1990s, and also 2000 AD. He has also contributed to DC Comics titles, and his Warhammer Fantasy and Warhammer 40,000 novels and graphic novels for Games Workshop's Black Library now run to several dozen titles and have sold over two million copies. In 2009 he released his first original fiction novels through Angry Robot books.