Amazon calculates a product’s star ratings using a machine learned model instead of a raw data average. The machine learned model takes into account factors including: the age of a review, helpfulness votes by customers and whether the reviews are from verified purchases.
All this book did was depress me even further about my failings that led to creating my Prince Boofhead. There was only a brief touching on mental health considerations. My son was already going down this path when he attempted suicide. I realised in hindsight that I was after that too afraid to enforce boundaries etc in fear of triggering another attempt. This made things worse. I have found limited resources that take into consideration for when the parents have mental illness as well.