Instruct: Classify an Amazon review into positive or negative sentiment.
Query: One of the best true crime books written

I have been reading true crime almost exclusively since I can remember and this book is ranked in my top 3. It intrigues and captures the reader from the childhoods of Karla and Paul to the investigation and following trial. All I can say is Canada should of reinstalled the guillotine for these 2 depraved individuals. It is apalling and quite scary that they, especially Karla, will get out of prison. I moved from the US to Quebec in 95 and the trial of Paul Bernardo dominated the news, this book allowed me to see what all the fuss was about. It also allowed me to realise how dangerous it is to give 2 seemingly normal and upstanding individuals directions on a deserted street and for that, I thank you Nick Pron. I would recommend this book but only if you do not mind graphic descriptions of sexual crimes.