The Sinner is a decent medical thriller which I enjoyed, although not as much as the past two books by the author, The Surgeon and The Apprentice. The strength for me was the plot which had me guessing and the style of writing which was lyrical and descriptive. The characters Jane Rizzoli (a detective) and Dr.Maura Isles (a forensic examiner) were interesting but it seemed strange that they both were successful professionally and yet hopeless with men and relationships in general. The book was written in a way that made it seem as though only cold, extremely tough and blunt women can succeed in a professional arena. In the Surgeon I liked reading about a controversial, edgy female (Jane Rizzoli) and that still stands. However, I found some of Rizzoli's needless rudeness and nastiness towards anyone who shows her concern to be wearying this time around because it was so unnecessary in many cases and she came across as petty rather than angry about sexism in the police force. I also found the dealing of the Catholic Church to be very heavy handed and biased. All the nuns were described many times as old and detached - not a single one of them was given any personality, depth or kindness. The only young nun was written about in an equally negative way. Secondly, both Maura and Jane were lapsed Catholics and were highly cynical about religion of any kind. Of course, this is fine, but there was simply no balance to the book as no religious characters were allowed to speak. In the end I found the constant sniping about faith and belief to be jarring. Overall the Sinner is a competent thriller and the medical details were excellent. There were surprises and shocks along the way and the characters were believable if not always likeable.