This is a great book on SF during Vietnam conducting some great covet operations during Vietnam. I was looking for another book on the same topic when I found this electronic copy. I read through the book in a weekend
The Secret War Against Hanoi: The Untold Story of Spies, Saboteurs, and covert warriors in North Vietnam. By Richard H. Shultz Jr.
http://books.google.com/books?id=mGX...tput=html_text
Another great boon in this topic is Project Alpha: Washington's Secret Military Operations in North Vietnam. By Sedgwick Tourison