Usually a self help book can be found to a good indicator of how helpful it can be for you if when you pick it up there's a lock in of sorts and you really truly connect with each sentence within every chapter. Something about the frequency of the author resonates with who picks it up on a person to person basis.

Mostly on the spiritual side:

All three volumes of Yoganana's talks: Journey to Self Realization, Mans' Eternal Quest, The Divine Romance. Celestine Prophecy Four Agreements Adyashanti: End of Your World You Can Heal Your Life How to Win Friends and Influence People Swami Rama: Meditation & it's Practice Power of Now (probably the more channeled of the two) A New Earth A Course in Miracles (cryptic unlocking self help) The Inner Voice of Love by Henri Nouwen (amazing for anguish) Mr. Jones Rules by Dylan Jones Gifts from Eykis by Dr. Wayne Dr. The Prophet The Voice of Knowledge Spirit Junkie I Am That Untethered Soul