Reddit reviews Introduction to Politics

There are some real introduction to poli sci textbooks out there, but they are really pretty dry. For instance, I used something like this book when I took a intro to political science course, but it doesn't exactly inspire the level of interest more specific books might. It's useful though because it covers domestic politics, international politics, and political theory and philosophy.

If you just want to look into the US, then Logic of American Politics is a pretty good, albeit dense, place to start. If you want a more global perspective, I'd try out something more like this. I don't really know a good intro to IR or Theory book, but if you're interested in war and how countries interact then look into international relations and if you want to think more about what is "good", "just", or how things should work you might want to look at political theory.