This is a story of two souls existing in one body. It is a story of impending madness, demonic possession, and a group of friends than ban together with a twisted goal of achieving the impossible and irreversible, and a plot twist that will leave you open mouthed and furiously flipping pages to the end. 
 This story is, in a word, brilliant. 
 A thriller that was flawlessly executed, that kept me guessing the entire way through, it made my heart feel as it was going to burt out of chest. The format of the story, told in diary entries and police reports/interviews, gave the book a unique perspective that kept me engrossed throughout. It felt like I was watching a horror movie unfold in my mind, bearing witness to Kaitlyn's descent into clarity (madness?). 
 This book will leave you with questions, but will also give you answers to the mysteries that were so finely crafted in this story. I honestly have nothing negative to say. It was addicting. It was true suspense and horror, and now I need to seek out something "fluffy" to read in order to calm my racing heart. I will definitely be looking forward to more from Dawn Kurtagich.