Greeting acolyte [PURGED]
You've been tasked, by the holy Inquisition with analyzing the heretical text ''The Collapse of Sierra Segundus ". A book allegedly written 10 years after the event describing the fall of a system to the foul influence of Chaos during the great night.
While this genre of stories is fairly common and allowed under article 45.6 of the Lex imperialis, this one breach article 112.5 (b) and article 2453 (z) of The Lex by displaying a constant and willing support of this system heretical secession from His holy empire.
The text has been made illegal across the empire. Though a small group of heretics have shared the story, because of its supposed dramatic qualities. Lord [PURGED] even tried to make it into a play.
These matters do not concern you. You've been provided a largely uncensored copy of the text with one mission. To identify appropriate information, we may glean from this new heretical force and the threat they represent. You will also have access to all operational documents regarding the planet to confirm which part of the story is fiction or reality. Our records are somewhat spotty on the system so you will have to be careful with the sources you use.
Be especially interested in their description of operation Chainsword Breaker since we would like to understand how a space marine chapter was [PURGED] and [PURGED]
Take also interest in their leader, a certain Lady Sepherael Bale. She is a servant of Chaos and managed to seduce a Space marine into betraying the emperor. This book may help us understand their insidious plans.
I'd like to warn you that everything you will read is a lie, fiction and fabrication. Not all of it is intentional. Some of it is due to their flawed view of the world, other by personal interest or simply for stylistic purposes.
No matter how well they lie, there's some truth in this text and I believe your work will uncover it.
Please reports periodically to me.
Signed:
Lord Inquisitor [Guilty of article 7 (v) heresy]