Evolution was a free book on my Kindle and it was good for a free book. I thought Jade and Aiden were ok characters. I didn't like that we never got to really see there relationship. The whole story was a little strange and barely explained. It was all a bit contrived. I will probably read the next ones if they are free but wouldn't pay for it. It was a nice quick read. So if you want a quick read this is your book.