While 'Sinner,' by Maggie Stiefvater is considered the fourth book in the 'The Wolves of Mercy Falls' series, it really doesn't have the same draw that the other three books had. This book follows Cole St. Clair, an important character from the previous books as he heads to Los Angeles with the intention of getting Isabel Culpeper, another character from the previous books, back. While in L.A., Cole has also agreed to be on an online reality show to document his official comeback as a rock star, which doesn't go over too well with Isabel.
Isabel left Mercy Falls in order to start over. She fled from Cole and his damaged and drained rock star persona, and wasn't prepared when he showed up in L.A. While she tries to build herself a new life in L.A., she can't help but be drawn back into Cole's arms; no matter how hard she tries to resist. She knows that he isn't good for her, but she simply can't let go.
Maggie Stiefvater is a beautiful writer. She is able to capture you attention and with engaging storylines and captivating characters. In order to really have a chance at enjoying 'Sinner' you have to have read the first three books in the series because there is so much backstory on Cole and Isabel. Even though this is supposed to be a stand alone book to the 'Wolves of Mercy Falls' series, I don't think it would be as enjoyable without knowing the backstory of these characters.
The great thing about this story is that both Cole and Isabel are tremendously flawed, which isn't something that you often see in young adult fiction. Both characters struggle against their demons throughout the entire story and by the end of the book they are still flawed. There is no magic pill that turns them into perfect characters with perfect lives.
Although 'Sinner' didn't turn out to be my favorite book in the series, I did enjoy getting to see more of Cole and Isabel. Maggie Stiefvater is a great writer and I highly recommend reading the entire 'The Wolves of Mercy Falls' series.