Calista after chasing away Orson and the girls, since she needed space to think about Diana's suggestion and how it might impact her future projects if she takes on this assignment, was lost in her thoughts.
If she writes a book, no matter how big or small it is, it would be her name on the cover. People might end up being curious about her and so forth, and that might disturb her normal life. Something that she didn't want to see happening.
There was a reason why she picked such backwards villages in the first place.
Although she had opened a factory and her name spread everywhere, at least in her district and surrounding ones, it hadn't reached the point of making her attract some big family's attention just yet. So, she was safe.
If she wanted to write and not be subjected to scrutiny or too much interference in the future, then there was only one way to do it; use a pseudonym when she writes.