Either eclectic modern clinical psychology (introspective methods) or taoism. But both are hard to learn through texts sadly (anything important really is)

psych: https://www.amazon.com/Unlocking-Emotional-Brain-Eliminating... https://www.amazon.com/Gestalt-Therapy-Excitement-Growth-Per...

taoism: https://www.amazon.com/dp/B003T0G9E4/ref=dp-kindle-redirect?... but really, search for a master