I really loved this one. I loved the characters and I loved Rhine. There were a few things that didn't sit well with me and thus the 4 star rating instead of 5 stars. It didn't make sense that the virus would kill women at 20 and men at 25. What is this virus? Is it a virus or something genetic? I would like to know more about what this virus is, why it does what it does and where it came from. Those questions may be answered as the series continues.