A game-changer for me recently has been that you can read on Kindle on the iPad in split-screen with Notes, highlight something on Kindle and drag it into Notes.
These are great tools but are there any nice iOS apps to quickly take a photo of a physical book page , and with OCR produce a text page that I can highlight, and send highlights to Roam (which I use a lot).
Some books are much better experienced in physical form, e.g I would hate to read Rian Hughes’ XX on a kindle :)