Huh, then what did she pull there?
So what would have happened if we read the book?
The obvious question; what created Are and played with her fate to the point that she didn't notice even with the whole Orrery incident?
There will still be a few revelations of what it is exactly Are did - the story is far from over, as you see.
The book was a tool and a weapon, and it served its purpose whether Are read it or not. As was correctly surmised earlier by the players, it is not the book itself, but its contents that were so dangerous.
As for the obvious question, you have all the information to deduce the answer, but it does require a peculiar cognitive leap, as this whole story is a testing ground for a few ideas in storytelling I've been having. A reveal will come, but at its own time.