Ingo Swann's book called PENETRATION is pretty fascinating.

http://projectavalon.net/forum4/showthread.php?9462-Interesting-Free-Books-in-PDF&p=527017&viewfull=1#post527017

I agree that it's troubling. not for what was revealed, but what was still classified top-secret. It's still going on, of course, but we're not allowed to participate. Whether they saw AI come to fruition, for example, we'll just never know, anyway until it's too late.