It would look largely identical to ours, I think. It's pretty trivial to get access to many, if not most, e-books.
Any public-domain work is available on Project Gutenberg [0]. Copyrighted works can be accessed for free using tools of various legality: Libby [1] is likely sponsored by your local library and gives free access to e-books and audiobooks. Library Genesis [2] has a questionable legal status but has a huge quantity of e-books, journal articles, and more.
[0]: https://www.gutenberg.org