The Venom of Vipers by K.C. May

A supervirus threatens to wipe out the human population.
The only hope for the future is a cure hidden inside Ryder Stone. Created in a lab and brutalized, betrayed and hated by humans, Ryder yearns for freedom. On the outside, a group of human genetic purists want him dead.
When Katie Marsh, a brilliant young geneticist, discovers his secret, she must fight to protect Ryder, gain his trust...and convince him to save humanity before the purists destroy them both.

About the Author: K.C. May was born in Chicago and grew up in the mid-western USA and in Hawaii, attended University of Colorado in Boulder and graduated with a B.A. in Russian from Florida State University. In 1985, she moved to Taiwan to teach English and study Mandarin Chinese. She also lived in the Arizona desert for 24 years, where she founded and ran a non-profit Rottweiler rescue organization, studied Ken-po karate, went backpacking, tried sky-diving, dabbled in bodybuilding, did some downhill skiing, renewed her interest in motorcycling, and spent some time on the shooting range. In 2010, she retreated to cooler, greener Georgia. She earns her living as a full-time writer.

Dawn's Review:

All I can say is WOW! Ok, I can say more than that, but it's pretty much more of the same. I loved this book. Not only was it a really great story-line, but it was just so well written. There wasn't so much detail as to bog down the book, yet nothing was left out. But mostly, it was a really great story. I loved the characters, and the story itself was really unique. With only two chapters left in the book, I had to leave for a short road trip over the weekend, and all I could think about was getting home so I could finish the book. It was the first thing I did when I got home. The final chapter is so touching and I found myself tearing up at the end. Don't worry, it was the good kind. You'll know when you get there!