I enjoyed this book. We follow along the journey between the POV's of Dr. Kate Warner and Agent David Vale. We follow along as we try to find out the mystery of why things keep happening to them and as they try to figure out who is behind all of it. I was never bored readng it and I couldn't put the book down, as I wanted to figure out what is going on. There's plenty of action scenes and the pace moves fast.
We were left with a ending that will make you want to pick up the 2nd book to figure out what the aftermath is going to be.