Sub Books Online
 

During a recent historical search, I came across an online book, "United States Submarine Operations In World War II". The book appears to be in it's entirety and there are some others available from the sidebar. It would appear that not all books are available in their entirety unless so disposed by the publisher, however, this one appears to be all there. Just thought I'd post this for anyone interested, who might not have known about this:
http://books.google.com/books?id=5lT...ollege&f=false