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I used this book as supplemental reading for an introduction to investments class I teach at UConn. I worried that the students might find it too simple, but they loved it and found it full of useful information. I should note that most of these students have little or no experience with investing. So, if you are a novice investor this would be a very good place to start. Zweig goes through numerous things to watch out for and several things to make sure you do before you take the investment plunge.
Jason Zweig is the best financial writer I know of (maybe along with Warren Buffett), and the reader benefits from his insight, pithy and entertaining way of putting things, and his vast knowledge not only of the financial world but also of human behavior quirks which can derail investors. Everything you need to know to keep your money safe while investing it is in this small volume.
I had the version of this book in the hardback but I wanted an edition on my kindle. This is an excellent common sense book on investing. I re-read the book every time I am thinking of doing something foolish with my investments and it keeps me on track.