This is a book about child abuse. The author was abused by his mother when he was a child, until he was 12 years old. The 'crazy' mother burned the author's hand, deprived him of food for 10 days, made him ate his own vomit, made him ate dog's food, poisoned him with chemical, hit him and did not call him by name, but instead, called him by the word, "It".
The story really portrayed to me about how mad people can be, sometimes. As I read the story, I think the mother is mad. Something must be wrong with her to abuse her child the way she does.