I have read that Apple Books keeps track of what you read and even follows your eye movements to map which passages you spend more time on or read multiple times to get a detailed profile of you. Can Apple comment on that? Please don't give me opinions, I need facts. We all know it is possible (and easy) to save how much time you spent reading which page, it is possible to activate the camera to follow your eyes while you read, to detect if you prefer love scenes, violent scenes, political writings etc. etc. Is this true?