Knowledge is power... I highly recommend all of the books listed here.
The Promise of Energy Psychology - Gary Craig, Donna Eden and David Feinstein
Energy Psychology Interactive - David Feinstein
Adventures in EFT - Sylvia Hartman
Energy Psychology - Fred P. Gallo
Introduction to Energy Medicine - Donna Eden, David Feinstein
Instant Emotional Healing - Acupressure for the Emotions - Lambrou & Pratt
Energy Tapping - Fred P. Gallo
Attracting Abundance With EFT - Carol Look
Freedom at Your Fingertips: Get Rapid Physical and Emotional Relief with the Breakthrough System of Tapping - Joseph Mercola + 20 EFT Experts
Getting Thru to Your Emotions with EFT: Tap into Your Hidden Potential with the Emotional Freedom Techniques - Phillip Mountrose
The Heart & Soul of EFT and Beyond: A Soulful Exploration of the Emotional Freedom Techniques and Holistic Healing - Phillip Mountrose
The Attractor Factor: 5 Easy Steps for Creating Wealth (or Anything Else) from the Inside Out - Joe Vitale
Energy Medicine - Donna Eden
The Molecules of Emotion - Candace Pert
Destiny of Souls - Michael Newton
Journey of Souls - Michael Newton
Embraced by the Light - Betty Eadie
After the Light - Kimberly Clark Sharp
The Field: The Quest for the Secret Force of the Universe - Lynne McTaggart
The Intention Experiment: Using Your Thoughts to Change Your Life and the World - Lynne McTaggart
Power vs. Force - David Hawkins
The Biology of Belief - Bruce Lipton
Life Energy - John Diamond