Although I have not read this book yet I find the many negative reviews a bit sad. I find most of the reviews sad because the people writing them seem to be coming from a rather narrow view that if one experiences abuse that one must and should act and feel a certain way. From a therapist's perspective, I would say that humor can often help a person process his past.
It may sound unusual to use humor in this context when talking about sexual abuse or any kind of abuse, but it is the patient's right to use whatever means helps him or her to work through their process out of the darkness of any kind of abuse. Now I realize I need to read the book, but I think the movie gave me a good idea of what the book was about. I would say if writing this book helped validate this survivor's experience then that can only be a good thing, so why judge it?