Piper's review posted on Guilty Pleasures Book Reviews 
 4.5 Stars 
 I really do not even know where to begin this review. I knew going into this book that it was going to be a hard emotional read. I am a fan of the KGI series, and I have been somewhat disappointed in the last two books. That being said, I have also been interested in PJ and Cole since getting to know them somewhat in previous book. So I pushed all the negative comments I heard, and some that I had read, to the back of my mind and dug into Shades of Gray. 
 This book was emotionally draining, and yes violent at times, but it was still a wonderfully written story that took you on a journey to hell and back. I really got lost in PJ's story. This book deals with some every heavy issues, but I still found myself not able to put the book down. Even when I had to walk way to gather my thoughts, I went right back. Horrible things happen to PJ, and her team has to endure her hell right along with her. These events change PJ and her team forever. 
 PJ goes to a every dark, dark place and Cole is there is pull her out. PJ sees that needing someone is not a bad thing. PJ and Cole truly make each other better people. I love that their story will continue as they begin to heal and overcome the events they go through. The end of their story is not a neat little happy ending, but a beginning of sorts to a new life with each other. This book made me remember why I fell in love with KGI series and I am now looking forward to Steele's book and where Maya takes this series in the future.