If you are specifically wanting to read Sarno first (which is what I did), I'd suggest Mindbody Prescription first and then The Divided Mind.
However, having just finished Steve Ozanich's Great Pain Deception, I would strongly suggest reading that book first. He introduces you to all of Sarno's concepts and quotes him directly frequently...but I found his perspective as a 'patient' who has healed from extraordinary circumstances to be invaluable. He goes into a lot of detail explaining exactly HOW to put Sarno's concepts into practice and gives you a real and practical methodology. He also ties in so many other great thought leaders within the world of Mindbody medicine and practices (Jung, Alan Watts, Eckhart Tolle, Louise Hay, and many, many more)...a wealth of threads to further pull on and expand your own level of consciousness and enlightenment.
