.... I kinda want to see now all the attempted isekais the book helped her avoid because some of them looked rather awesome. But the book was more likely triggering them in some way to make her dependent on it like...literary stockholm syndrome. So the book is a yandere.... Also Nene best girl confirmed in this chapter, I love that it turned the FMC into a nerdy megane oujo and she never questioned it because it was for the sake of her grades and since it "helped" her in those other situations she had no issue with it giving her a makeover.