I’m frequently recommending “Complex PTSD: From Surviving to Thriving” by Pete Walker for this. I always knew I had an unusual childhood but didn’t think my parents were abusive, just quirky. As an adult, I started seeing a therapist for anxiety. They strongly recommended this book after our first real session. Surprise: parental abuse so pervasive that I thought it was normal!

I’ve had a few friends and acquaintances give it a read and they knew within the first few chapters if it was right for them or not.