Nick Ross sets out his position from the outset. This is a polemic - a strongly put argument that much of our understanding of crime and punishment is misguided. And although there are points of detail one could argue about for the most part he's right. He's adopted an interesting approach to the evidence upon which he bases his arguments, relegating it to an accompanying website. But the crucial point is that he does cite a lot of academic research in support of his various arguments.
He does run the risk of diluting some of his points by the welter of statistics which he uses in the book (simply because you then have to go to the website to check the source of his stats and then consider whether you agree with his interpretation of the stats and after a while this becomes a bit tedious).
Perhaps the most amusing part of the book is the chapter on the way the media consistently misrepresent crime which they then proceeded, with a wholly predictable inevitability, to do to the book. The focus on the chapter on sex offences was predictable as was their request to critics to denounce the suggestion that some rapes are more serious than others. Try reading the book and you will see that Mr Ross has a clear concern for victims and at no point condones sexual offenders, but that does not stop him from questioning some of the views routinely offered on the issue. Sadly the British media love to polarise such issues, which simply inhibits mature, reasoned debate. So simply take them out of the equation and read the book and consider it for yourself.