A couple of book recommendations, this time for folks into the Vietnam conflict, be it with FoW Vietnam or Charlie Don't Surf. These are:
In The Field: Vietnam and My Letters Home, by Damon Darley. Basically this is a set of transcripts of the author's letters home to his (very new) wife during his tour of duty in Vietnam.
Vietnam: No Regrets: One Soldier's Tour of Duty, by J. Watkins. Again a memoir of a tour of duty, but not (this time) as letters.
Both these books were available as free Kindle downloads a while back, but they're both still under a fiver each, and well worth a read, especially if you want to understand the poor infantryman's view of the conflict.
I have a copy of Charlie Don't Surf. This may be bad news for my lead mountain :D