Sophia Bogle is an expert at restoring old books and I was riveted by this video of her taking viewers through the deconstruction and restoration process, including a tour of her workshop and some of the tools she uses (e.g. a repair knife she designed herself to resemble a fingertip).
https://kottke.org/24/04/this-woman-deconstructs-100-year-old-books-to-restore-them