Attack on Titan Vol. 17 (Kodansha, 2015)

Thanks to Rod Reiss, Eren finally knows the terrible truth behind how he acquired his Titan powers, and the depth of his father's crimes. The king orders his daughter Historia to kill Eren and restore the power of the Titans to its rightful place, but she chooses her own selfish path: survival. As the cavern crumbles around the Survey Corps, Eren must make another last minute decision, with the lives of all his friends in the balance.