This book...wow - I picked it up in a bookstore (it is by Dan Millman). It has a very simple numerological take derived from your birthdate. I was prepared to be unimpressed, but I read my chapter (I am 30/3) and wow - was blown away by its accuracy. He also has a great and clear writing style that is easy and nice to read. This is the same guy who wrote Way of the Peaceful Warrior if anyone's read that. it was great for an overview of my life path and also helpful in pointing out what challenges I had. I just ordered it so i could have it as a handy reference for researching other people too. It also surprisingly gave me new information that previous numerology readings have not - which is why I was so surprised, since it uses such a simple formula.