I'm also reading (not about Vietnam!) Debra Hamel's excellent Reading Herodotus, which would serve as a good introduction to anybody who wants to tackle the Father of History (or the Father of Lies).
Fiction ranges wildly. Keeping with the Vietnam theme, I am reading both Matterhorn and The 13th Valley (a bit more through Matterhorn than Valley). In trying to read some translated works, I'm reading