'Why Has Nobody Told Me THIS Before' is written by clinical psychologist Dr. Julie Smith.
It explains how mental issues work, each chapter ends with useful exercises you can try yourself. This way, you can try working out problems you may have yourself.
If you need more help, the author urges you to get professional help. She acknowledges that help is not available for everyone. This is why she has a presence on social media channels to reach out with advice and excercises you can try.
I found it a very helpful book that I can recommend to friends who struggle with their mental help. Everything she says is grounded in solid scientific and psychological research.