I'm an avid trader using Elliott Wave as my primary basis of market forecasting possibilities and trade off a specific Wave setup. This book is compilation of Elliott's old subscription based newsletters that teach and predict the market in his time. Commentary is by Prechter who adds some comments and clarifications at the end of each news letter. While Elliott is nearly a godlike status in my mind , I found this book is pointless for trading and learning purposes. Among the many letters and Prechter's annoying hindsight commentaries , you will find bits and pieces of the Wave based principles. I have found most of the useful information to be very basic Elliott wave, which can be found in Chapter 1 of most any modern Elliott Wave book. I also did not follow on many of the wave counts, which break many of the well known modern rules. This is understandable as EW was still in its infancy at the time of writing. Overall, this book has little or no value to a trader.