The book I'm reading is "Chi Running" by Danny Dreyer. I found it referenced on www.chirunning.com under books. The website gives some general information and some excerpts from the book.

This past spring, I focused on breathing only through my nose on easy runs and it seemed to help - quite a bit - with my pacing, managing my energy, etc. My pace actually picked up as the weeks went by. I figured maybe I was nuts to think focusing on breathing had that much effect, but whatever floats the boat.--

I'm not finished with the book yet but Chi Running just sounds like a great approach right now.

Deb