he third tale is called Exterminatus and his plot follows the first book. After finding two titans on a planet the inquisition comes. After deeming the world for exterminatus after a strange storage with a blank psychic and a chaos marine he searches from where this storage as comes. Here and after being duped he is helped from some unexpected visitors. As he grabs some allies he lay siege to the thousand sons chaos space marines. In this book the inquisition also enlists the help of Black Templars. As I said the first and third story are linked.