I am a huge fan of the author of this book, Nicolas Darvas. I have used his system during bull markets with much success, returning $4000 profit per trade and $10,000 profit in one month trading an account under six figures. While he gives excellent insight in this book about some of his trading methods like finding the small companies that will benefit from a large companies new technology through suppling components, his previous books are much better. In this book (Written in 1970) the author predicts the coming boom in the over the counter market which is now known as the Nasdaq. He gives advice on coming hot industries and lays down some very good trading principles, but sadly most of his material is out dated. Buy this book to get a look at the way a master trader's mind works, but you really need his other books "How I made $2,000,000 in the stock market" and "Wall Street the other Las Vegas" to fully learn his amazing stock trading system that could make you wealthy during a bull market.