I was enticed by the premise here, but did not like the execution of the story at all. In the earlier chapters, there are a ton of grammatical issues. There were distracting and made the author's thoughts come across very haphazard and jumbled. Luckily they were short-lived, and the writing quality came across much more clear and concise after that point. I then spent a good deal of the book wondering why there were so many unbelievable and downright odd decisions made by the characters. They all seemed to occur to just push the story along, but there was nothing logical going on. For instance, as Robert and Jeremy were trying to locate Ann, after several murders and her direct link to them and and their experiment, they came across Bricks. And proceeded to willingly divulge very incriminating details of their failed experiment to a total stranger, within seconds of meeting him. And on the experiment itself, there was absolutely no development, i.e. vetting potential subjects, prompting viable subjects as to what their injections were and the aim of the study, tracking long term effects even after the antidote was given, etc. There was very little that came across coherently, and the ending, where everything tried to come together, just seemed thrown together, too. I did enjoy some of the banter between Erica and Ann, but it wasn't focused on enough to have the full, desired effect. The scenes of violence also felt very forced, with nothing creative, no good lead up at all (Literally several cases of 'Hi, I'm so and so. Let's go to my place.'), and there wasn't much internal dialogue to show the shift of what Ann was feeling during her 'changes', either. I guess to sum it all up, the book had absolutely no 'flow.' I wish that I had more nice things to say here, but I did not have a very positive experience with this book.