I graduated with a degree in econ so I'll throw my two sense in. I've heard good things about The Big Short, Too Big to Fail, Barbarians at the Gates and Pickety's Capital in the 20th Century. A couple books that I have on my reading list are The End of Poverty: Economic Possibilities for Our Time, The Rational Optimist: How Prosperity Evolves and Savage Inequalities: Children's in America's Schools. On a side a lot of these books are really dense, so if you just want to get a solid summary you could youtube the Author because they tend to give lectures that summarize the conclusions/findings in their book. If your just trying to get your foot wet though I would recommend reading a couple magazines consistently like The Economist and Harvard Business Review.
And if you're up for the task you could read the book that started it all, The Wealth of Nations by Adam Smith.