This book can help you take control of your own investments in a way that is just not possible through the stock market. You can legally invest in raw land or income producing properties such as condominiums or shopping centers.
In addition to opening up the possibilities for some significant profits, you can invest in properties that are much more personal and real to you than some investment in a mutual fund. I cannot quantify the value of this but there is certainly something there that makes investment in real estate very attractive to many of us.