Tim Harford's a good writer - he's got some books that I highly recommend as a gentle introduction to economic thinking:

* "The Undercover Economist" - http://amzn.to/1sCImVw

* "The Undercover Economist Strikes Back" http://amzn.to/24bIFT3 - this one's about macroeconomics.

As well as various others. One thing I like is that they're mostly fairly neutral - he's really trying to explain the thinking, rather than beating you over the head or espousing one position.