: It is often cited as one of the most disturbing books in the Warhammer 40k library.

: Uriel must lead a ragtag group of "Unfleshed" and other renegades to strike back at the Iron Warrior Warsmith, Honsou, and complete his oath to redeem his honor. Why It Is "Interesting"

The name refers to the third installment of the Ultramarines series within the Warhammer 40,000 universe, titled " Dead Sky, Black Sun " (Cielo Muerto, Sol Negro) by Graham McNeill .

: It explores the conflict between rigid military tradition and the necessity of independent thought in the face of absolute evil.