A Voice in the Warp
This heavy looking tome bears an image of a daemon embossed on its front. Last seen in the hands of the Chaos marines as they escaped in their thunderhawk.
This book was encountered again later on when the forces of the Emperor heroically crushed a heretical cell operating deep within the space hulk “Edge of Damnation”. It was recovered and used to predict the next coming of the Tyrant Star. It currently resides in Inquisitorial possession as it was quarantined after the events upon Iocanthos.