I recommend Arnold Kling's Three Languages of Politics. College is (hopefully) a time of meeting a lot of smart people who disagree with you, sometimes correctly and sometimes not. Kling's book is a nice reframe of political disagreements that makes it easier to see opponents as wanting to preserve different goods rather than just wanting to destroy the good things you love.

In my review on my blog, I thought it was good introductory material for passing Ideological Turing Tests for different political mindsets. Plus, learning to get curious about opponents is a good skill to train for all the questions you'll encounter in college.