E- Books on Security - From University of Pennsylvania Digital
Combined Arms Research Library Digital Collections -
Monographs on military studies, military history, stability and support
operations, and more.
Institute for Security Technology Studies(ISTS) -- Library -
Open ISTS publications.
Security Archive - Provides electronic briefing
books, such as The Pentagon's Counterspies.
and Security Collection in NAP - E-books
from National Academies Press.
Search EBooks - A search engine for free ebooks.
You may search more E-books by Google Books