Jesus, Joseph, and Mary this book is so fucking long. More than just the page/hour length it feels like it's long, meandering, and dragging for the first 65% of the book. 
 This is the story of a military experiment gone super wrong releasing into the world vampires. It covers the time when this all started and then the time about 100 years later. It's creepy and I definitely gave me the shivers. 
 Story wise I liked it, I just didn't love how it was getting there. I like the last 45% a lot more than the rest and the pacing closer to the end. While I think you needed some of the information from the beginning I also just felt like it was going so slow and not giving us enough for the length it was. Also there is a fair amount of christian religious stuff going on in this book just as a heads up. On the positive the characters in this book are great, even the ones that have a small role have some really interesting things about them and their own story that you can clearly see and is interesting. I really loved the characters in this book. I also really appreciated the settings Cronin built. They felt super accurate, true, and horrifying. 
 Even though I felt like I was trudging through this book I'm going to pick up the next book in the series because I want to know what is going to happen. I really hope the pacing is better and it doesn't feel so long.