See http://traumaprevention.com/2009/12/31/what-is-tre/ for a short description.

I follow the instructions described in the video available for purchase here: http://www.namastepublishing.com/products/digital-download/revolutionary-trauma-release-process-real-time/DB01-TRTRE

The first 15 minutes of the video talks about the philosophy, then the exercises, and after there’s testemonials and a Q&A which answers a lot of the questions you will have afterwards.

Recommend watching the video before reading the books, which are available at Amazon or Namaste Publishing. 

I’m not affiliated, just genuinly curious.