Phoooo, that's a toughie.
Marcel Mauss' "The Gift"? (ostensibly a study of gift exchange in small-scale society, but with applicability right across human interaction)
Clifford Geertz's "The Interpretation of Cultures", but that's a series of essays.
Something my Claude Levi-Strauss?
I think these are probably all too 'niche' barring perhaps the first.
You'll note I can't think of a single archaeological book worthy of mention...