I like to use the notebook to make notations while reading the book. As you know the notes are attached to parts of the text (you select when making the notes).
What happens with them when a new book version appears? I hope they will not be thrown away as I rely on them quite a bit.
The notebook is linked to a specific edition of the book — so if a new edition is published, you start with an empty notebook (as we can’t really guarantee that the new edition of a book would include a paragraph or sentence you’ve previously highlighted.)
However, you can look back to a previous edition, and your notes on that edition.