This Original Manual of E.F.T. by Gary Craig was very informative and well written. It was the bridge that led me to an amazing journey of discovering first-hand how our body-mind's emotional intelligence can work, and the ability to heal when we addressed underlying emotional issues that have literally become stuck in our body. Many years ago, when I finally realized that the pain in my body was not going to improve in a lasting way by any of the methods I had previously tried, I decided to sit myself down and just read this entire manual in perhaps 20-30 minutes. I then immediately began implementing the technique and was blown away by its effectiveness! I have not experienced that pain anymore after the session I gave myself from reading this PDF. Since then, there have been many innovations on the process, by many people all over the world; however the essence remains the same. I highly recommend that one read the original manual out of respect for the original explanations presented, that provide a strong foundation for EFT.