The untethered soul
One of the greatest books on discovering yourself and mastering yourself.
Biggest lessons from this is that you are not the voice inside of your head. Emotions come and go, and you just need to notice them coming and going. Realize that you are simply experiencing them. You are not the thoughts. Thoughts are just something else you’re aware of. Voice inside my head
So when you feel something, notice it instead of letting it control you.