Any of my fellow niners that can help a friend of mine with this?

"im getting super frustrated trying to find books on food as a cultural/social phenomena. most books seem industry focused :/ preferably id like something about food and its relation to social class, but more from a cultural point of view than a nutritional one.
its extremely frustrating how few nonfiction books on food are just "OHO FUN TRIVIA" because food is really a huge part of people lives
heck lots of cultures are fucking built around "we eat this and thats good and those guys are gross because they eat that"

So any suggestions for books?