Rather them work on natural reading of the books with Text To Speech. People with disabilities such as Dyslexia, ADHD, partial or total Blindness have to hobble on with the terrible TTS available. You have to select the text to get it to read, which means you will have to do that each page. A simple play & stop button for "read aloud" would solve this. They love to think about use cases to make things easier for their users, but have they hired disabled people to give comment? This has been a glaring issue to me, and I've told Apple, but nothing ever comes of it. Cool animation though .
Oh Crazy. It is so frustrating, for people with ADHD, in order to have our brains stimulated enough to keep focus, we have to read and hear it at the same time, so our option is to buy it twice.