The National Emergency Library is made possible by the non-profit organization Internet Archive. Their mission is to provide universal access to all knowledge. You can sign up for a free account and view videos, audiobooks, ebooks, and more. The Internet Archive is also accessible for free during non-pandemic times. There is typically a waitlist to “rent,” but under the circumstances they are making extraordinary efforts to make certain collections available for emergency remote teaching, research, and continued learning with libraries and schools being closed. Start reading here!
Another place to view ebooks is Project Gutenburg.