Currently I am reading The Market Wizards, I will read the new Market Wizards after. I read a minimum of one of the 'Wizards'' interviews each day. The actual content does not tell you what to do to improve itself and lots of the traders contradict each other or 'The Rules of Trading'. However it gives a great insight into the mindset required to achieve great results. I also tend to read something I don't fully understand in it, which I then research in my own time, widening my base knowledge of trading.
All in all I think this is one of the best books to start out. It doesn't get technical, it doesn't hurt your brain, but it will make you think more about the lifestyle, the mentality,the highs and the lows. It can open doors to things you have never thought were possible in trading.
After hearing from these pro's I do have to say, I take advice on here with a slight pinch of salt now. Every trader is different, advice is always great and appreciated, but sometimes that advice may work for them and not for you.