It does have some good information worth knowing. If you are a stock trader it may be helpful. I read this book a few years ago and found it relevant back then. I would say if you have at least 1-2 years in the markets you may crave for some more advanced material.
He does go over key market makers and some interesting day trading strategies. However, since I trade the index futures I did not find alot of materials useful. Its a real basic book.... alot of the material have been mentioned repetitively through different authors. I have yet to read a book that can beat
Mind Over Markets. Just my two cents.