I'm not an anthropologist/ethnographer or an architect, though I've been very interested in both fields (Latour, Le Corbusier, etc.). I found this book, mostly of interviews with architects about how they use drawing in their practice, very accessible for the non-architect, and also, I suspect, very interesting for the architect as well. The architects interviewed have different styles for how they use drawings and these differences are reflected in the structure and process of their practices (the intervews are exclusively with principals or very senior designers). The style of drawings (and models) they like to present in various situations (to junior designers, draftsmen, clients, engineers) forms an interesting picture of the social structure of architectural practice.