Exciting Stuff - Source for Free Reading

I was listening to The Survival Podcast this morning, and the host mentioned a book on MicroLivestock - basically, not commonly known, small livestock that can be raised by individuals and small communities sustainably.  I went to the link and WOWZA - a treasure chest full of stuff to read (and legal). 

Granted - it's not the most userfriendly interface, but lots of these books are out of print or expensive (MicroLivestock PDF version $67.00....over $100 for the print version).

What they have is mostly technical books - and learning stuff.  Priceless knowledge free - I'm really excited! (does that make me a nerd?) :-)

THE NATIONAL ACADEMIES PRESS
http://www.nap.edu/