Warhammer 40,000 Legends Collection: SEALED hardback novel
 
- Hereticus by Dan Abnett, Issue 39, #71

"Hunted by his former allies as a radical and enemy of the Imperium, Inquisitor Gregor Eisenhorn must fight to prove that he remains loyal as he tracks down a dangerous heretic whom the Inquisition believes dead - the dread former Inquisitor Quixos. As he grows more desperate for victory, Eisenhorn uses ever darker means to achieve his goals- but how far can he go using the weapons of the enemy until he becomes that very enemy- and no different to the traitor he hunts?"
 
ISBN 9772397591027