It's a pretty popular book (Healing Back Pain) you should be able to find it easily. Make sure to check out Dr. Sarno's bio, so you understand he's not a quack but a very well respected doc. He's treated many notable people including John Stosle from ABC's 20/20. He met Dr. Sarno while doing a story on pain management and was at first very cynical about Dr. Sarno's methods.
Like I said before, He saved my life.