That may not be "news," but NASA offers a lot of other free ebooks. See some, if not all, of them at
http://www.nasa.gov/connect/ebooks/index.html.
That link was posted before, on MR, on 10/19/12, at
https://www.mobileread.com/forums/sho...highlight=nasa, but the "news" is that there have been at least 5 books posted at their site since.
You might have to have an advanced degree in rocket science to understand some of them. Unfortunately for me, I'm a brain surgeon, not a rocket scientist.