Project Gutenberg is a library of over 60,000 free eBooks. Choose among free e-pub and Kindle eBooks, download them or read them online. You will find the world’s great literature here, with focus on older works for which U.S. copyright has expired.
Open Library is a project of the Internet Archive that lends e-books worldwide for free.
National Emergency Library
A collection of books that supports emergency remote teaching, research, independent scholarship, and intellectual stimulation while universities, schools, training centers, and libraries are closed.