Breaking the Habit of Being Yourself: How to Lose Your Mind and Create a New One is literally one of the best books I have ever read regarding mental health, self-help, or psychology. Dr. Joe Dispenza has an amazing vantage point on the working of the brain. He breaks it down in a scientific AND metapysical level, so no matter your viewpoint you can digest the information he provides.
I wrote a review about it on my website https://jchavae.com/2017/01/08/book-review-breaking-the-habit-of-being-yourself/
I still HIGHLY recommend this book to anyone dealing with any mental health disorder or any personality trait that you want to release (like anger or bitterness)