Open Access Research

The National Academies Press (NAP) publishes the publications of the National Academies of Sciences, Engineering, and Medicine. NAP publishes more than 200 publications per year on a wide range of topics in science, engineering, and medicine, providing authoritative, independently researched information on important matters in science and health policy. Many titles at this site offer free copies of books in PDF format.

A collection of open access scholarship from many of the world's most prestigious academic presses with a central focus on achieving the United Nations Sustainable Development Goals (SDGs)

Project Gutenberg is a library of over 70,000 free eBooks. Choose among free epub 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. Thousands of volunteers digitized and diligently proofread the eBooks, for you to enjoy.