Reply To: Creating a book file or not?

1. indeed, as long as you update the book file too. If not al little yellow warning sign when you open the book file will tell you a “chapter” has been changed.

2. Every “chapter” can have his own styles, no problem I think. Since you didn’t know that it would become a book, styles can be different.

A book file = all the files are still separate items, grouped under a new name (kind of “virtual folder with pointers to the different files which make up the book”).
Learning curve? Not so long, just create the book file, add the chapters, save the book file. Just don’t sync the styles, so all the styles in the different chapters will not be affected.