I just read The Undercover Economist: Exposing Why the Rich Are Rich, the Poor Are Poor–and Why You Can Never Buy a Decent Used Car! by Tim Harford.
Its an incredibly good book that explains every economics [like whether coffee shops make a profit and how grocery stores gouge you]. However the author sticks to the basic micro-economic trends and tries to explain how some of them affect the global economy.
It doesn’t have any graphs or equations and you don’t need any math to understand it. Pretty well explained. But it is a little dry and isn’t as entertaining as Freakonomics: A Rogue Economist Explores the Hidden Side of Everything. But from an investment or financial understanding perspective its a lot more useful.
I strongly recommend it for anyone interested in how a free-market economy should work.