The 'Book of Changes' was something that Russell came up with after witnessing the changes in the original story of his unpublished novel.
As the author who wrote the novel, [The Forgotten Swordsman of Ruined Star], for at least three years in his previous life, and as someone who only did it to pass his time while waiting for his stocks result or to let out his imaginations, he couldn't remember every minor details, but following the chronological events in his unpublished novel, everything would come back at the back of his head as the time passes when the events starting to unfold one by one.
And with the plain purple book in his hand, he decided to write the changes or new elements that happened in reality. By doing this, it might help him predict with more precision what might happen in the future that was brought by the forwarded events just like the Ranking of Exchange that should happen after the midterm exam in October, and not in the Emergence Anniversary that just ended.
