Good non-fiction for a university writing course?

Hi everyone,

I’m putting together my syllabi for upcoming writing classes, and I need ideas for some fresh non-fiction material. This is a required composition course for international students at a liberal arts university.

I’m interested in these themes, but also open to others!

-Food and health
-Cross cultural issues
-Gender issues
-Education

To be clear, I’m looking for popular non-fiction books that will serve as springboards for discussion and written exploration. I usually only use articles, but this university encourages instructors to add books to the mix (which is cool, I think). Any ideas?