Holy character development Batman! It only took 3 books but finally we're really getting to know the characters. Yes, we've met the Naturals and the agents and Judd before but this is the first book in the series that really gets into the meat of their characters. I've been dying to learn more about them, especially Lia and Sloane and we finally do. It finally really felt like the Naturals with Judd, Sterling, and Briggs were a family of their own making. The characters always seem to feel so alone in the world. But, when they come together, they finally feel like they belong. If you couldn't already tell, I'm loving the growing complexity in the characters and their relationships to each other. 
 This installment really stepped up the game in the series. The first two books were kind of "killer of the week" stories. This one was more of a (view spoiler)[giant conspiracy theory with hundreds of murders and killers dating back to at least the 1800's. A "Murderer Secret Society" if you will. (hide spoiler)] The tension is palpable. 
 Now I'm going to geek about about all the new story developments! 
 (view spoiler)[There was a throw back to that guy that Cassie met in the park in book one. I thought he was going to be the killer in that book. So glad they saved his reveal until now. He's Nightshade!!!! Holy potatoes! And Cassie's mom is still alive and is a captive of the murder society! Cassie has a baby sister! a;igha;hf'QYR32J4L N!!!!!! (hide spoiler)] 
 Now I have to wait until November to see how this all ends. NO! Gimme it now!