Non-fictional books about getting to know emotions?

Hello, I'm looking for books written by professionals that would further my language and understanding of emotions, in order to connect with my emotions on a deeper level. An example would be "Running on Empty: Overcome Your Childhood Emotional Neglect", but it doesn't have to be about neglect. I just want to understand and experience the emotional spectrum better, so any book (written by a mental health professional) that would help with that is good. If possible, I prefer shorter books, around 100-250 pages, but it's not a hard requirement.