As of June 2011, all PDF versions of books published by the National Academies Press (NAP) will be downloadable free of charge to anyone. This includes their current catalog of more than 4,000 books plus future reports published by NAP.
NAP is the publisher for the National Academy of Sciences, National Academy of Engineering, Institute of Medicine, and National Research Council–to improve government decision making and public policy, increase public education and understanding, and promote the acquisition and dissemination of knowledge in matters involving science, engineering, technology, and health.
