BookRiot recently asked readers to send in fiction titles that address social justice. It's a pretty interesting list. I'm not advocating all the titles on there, but there are many great ones. Social Justice in Fiction: A Reading List. I'm trying to think what I would add... There's a whole wealth of middle grade fiction titles that aren't even touched on here. Like Wonder, Rules, Among the Hidden...yep, this list could take a while.
Here's the Secondary Teacher's Reading Recommendations for Songkran Break: