I think this is where it all started. These are the ones that were incorporated into the Riley series I like so much. Sam is a mystery. Where did she come from and what is she? More and more it points to a military weapon creation. I mean seriously, who has 4 mothers and 4 fathers on their birth certificate? This second in the serious was fast paced and I enjoyed it. I want to read the next book ASAP so I can find out what is going on. I hope she doesn't leave me hanging. The suspense part of this book is pretty good. Sam and Gabriel's dynamics are also good because there is unnecessary conflict due to Gabriel's stubbornness. I want to kick him in the head to get it out of his ass.