lichess.org

Using books I own in studies

Say, I own a chess book, and I create a study with a game from there, including comments from the book and whatnot. Just because the studies are more convenient to work with than paper books or even ebooks.
If it's a private study than I assume it's ok, nobody cares. What if I invite another user into it, is it a violation? What if I make some of it public? At what point does it become punishable if ever?

This may be an odd question but better safe than sorry, just don't wanna get suddenly banned.

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