All PDF versions of books published by the National Academies Press are now downloadable to anyone free of charge. Read the press release at this National Academies Press Web page.
This includes a current catalog of more than 4,000 books plus future reports produced by the Press. The mission of the National Academies Press (NAP) publisher for the National Academy of Sciences, National Academy of Engineering, Institute of Medicine, and National Research Council is to disseminate the institutions’ content as widely as possible while maintaining financial sustainability. To that end, NAP began offering free content online in 1994.
Printed books will continue to be available for purchase through the NAP website and traditional channels. The free PDFs are available exclusively from NAP’s website, and remain subject to copyright laws.