Textbooks are one of the biggest rackets going.
I have tried to use online books and it does not work for my old brain. I need a book that I can flip the pages. Maybe younger folks can utilize online books better than I, but it doesn’t work for me. The other issue with online books is that there is no defined format for books. They come in may types from a sophisticated interactive website, to text, or a simple pdf file. Maybe using a dedicated device like a ‘Kindle’ would make textbooks more friendly for me, but the expense is not worth the gamble.