Board Thread:Warhammer 40k General Discussion/@comment-112.207.234.222-20160507120912/@comment-32714838-20171027103553

Unfortunately I do not know the book and this is for some reason not on Kurze's page but on Sanguinius's instead under the header of the Imperium Secundus

"During an attack on the city of Alma Mons, the Lion finally corners the elusive Night Lords Primarch and the two come to blows. After a brutal confrontation, the Lion eventually emerges victorious, and questions his brother why he had turned away from the Emperor, in which Curze simply replied, ' why not? '. Curze went on to explain that there was a monster in his head that he could not stop. Though he finally had Curze at his mercy, the Lion couldn't bring himself to kill his brother, and instead pummeled him again. He then ripped off Curze's backpack from his battle-plate and then lifted him over his head, and then brutally brought him down across his knee, breaking Curze's spine and paralysing him. The Lion brought the grievously wounded Curze before Sanguinius and Guilliman to stand trial."

While its not specifically listed the pages its pulled from this wiki at least.