Deep, intricate storyline filled with intensely high level science/physics/genetics. Hard to grasp concepts are (thankfully) described for the average person, but not dumbed down to ridiculousness. The intricacies of how dead people were injected and turned into live people who are different are described throughout the story. The story reads like a super fast paced thriller, with tons of blood and guts, running from bad guys, and intensely intimate scenes. Flashbacks give grounding and context to the past events. High level reading, not for the faint of heart. The struggle between self control and the darkness taking over is beautifully described. Glorious word pictures paint a visual of hard to grasp concepts.