Essentials

Letting Go: the Pathway of Surrender, Dr. David R. Hawkins, M.D., PhD . Book

Suggested

The Biology of Belief, Bruce Lipton. Documentary

The Biology of Belief, Bruce Lipton.  Book

Loving What Is, Four questions that can change your life, Byron Katie. Book

12 Rules for Life: An Antidote to Chaos, Jordan B. Peterson. Book

The Sedona Method.  http://www.sedona.com/What-Is-The-Sedona-Method.asp?aff=SHWFM1

Advanced 

(Please don't read these unless you are willing to have your mind blown) 

A Course in Miracles: Workbook.  http://www.acim.org

Power vs Force: The Hidden Determinants of Human Behavior, Dr. David R. Hawkins, M.D., PhD. 

The Eye of the I: From Which Nothing is Hidden, Dr. David R. Hawkins, M.D., PhD.

I: Reality and Subjectivity, Dr. David R. Hawkins, M.D., PhD. 

Healing and Recovery,  Dr. David R. Hawkins, M.D., PhD.