Good developers know that it's easy to write code. It’s their space, their specialist subject. It’s where they’re most comfortable and they can churn out code at a rate of knots when they’re in that zone. But what’s not so easy is to read it. For most of us it’s like cracking the Enigma and even the same people who wrote a piece of code can look at it a few months later as if it was somebody else's work.