I purchased this book as it is the first book, which named any U.S.Marines being involved with MACVSOG. That single piece of information had been a secret since 1964. Publicly, MACVSOG was a unit made up of U.S. Army personnel, mostly Special Forces and various other government agency 's, but no Marine Corps units were ever mentioned. I found out that one of our General's had passed away in December of last year so I imagine that was the reason our unit was included publicly in this book. We had been informed our presence was classified and would remain so. I was stunned to see our name listed as being involved with the Studies and Observation Group after all these years of anonymity. I have been reading this book slowly and making my own notes, so I have not as yet finished the book. For those that served time in Viet Nam, they may find this book interesting...for those involved during their career with SOG, I think they will be fascinated too. Semper Fi,