Reddit mentions of Introducing Cultural Studies: A Graphic Guide

I second the idea that it really depends on what languages/literatures your cousin is thinking of studying. I'd hesitate to recommend anything too theoretical for an incoming freshman. But, if you are going to go that route, here are some suggestions:

Erich Auerbach's Mimesis is the closest thing that the discipline has to a foundational text. Generally, this is required reading for a first-year graduate student. Not sure how I would've handled this as an undergrad. That said, I wouldn't hesitate to assign a chapter or two from it to any class I teach, provided it relates to our other readings. It's a kind of survey that traces the development of Western Literature from Homer's Odyssey to twentieth-century lit. Each chapter deals with a different text. https://amzn.com/0691160228

You could also try a reader of some kind. I worked with this text as an undergrad in one of my classes: The Cultural Studies Reader. It's basically an anthology of theoretical texts that catalogues different theoretical approaches and introduces you to a lot of major thinkers. I thought it was great and it really sparked my love (...ahem..."love"...) for theory. In my opinion, it's a bit more approachable than something like The Princeton Sourcebook in Comparative Literature, which is also a good option if you're looking for something more serious.

If you're looking to follow up on /u/Caitlionator's suggestion suggestion about Critical Theory, I would suggest Adorno's and Horkheimer's The Dialectic of Enlightenment. Dense reading for an incoming freshman (IMO), but worth it for someone interested in Marxist-oriented theory.

If all of this is seeming too serious and/or dense (which it might be for an incoming freshman), you could try some of the graphic guides published by Icon books. Here's an example: https://amzn.com/1848311818. There are all kinds of options for these. To be honest, I don't really think these are that great; but the few that I've seen seemed fun and interesting. They provide some good context, so they might work as a kind of springboard for you cousin to explore some of these subjects further on his own.

Other than that, it's hard to make suggestions without knowing what your cousin's interests are. As an undergraduate, I always would've preferred to receive a literary text as a gift rather than a theoretical text (unless it was something I really wanted). Maybe a book from one of his favorite authors, or one of that author's favorite authors? Does he like Classics? Maybe a nice copy of Homer?

Edit: spelling