Protocol zero

"When authorities in Alaska receive a disturbing call from a teenage girl, their investigation leads them to discover an entire family of researchers dead. Joe Rush is called to help examine the bodies. On the surface, it looks like a brutal murder/suicide. But the situation is nowhere near that simple--nor is it over. Upon closer investigation, Rush discovers the terrifying truth. The research team has fallen victim to something that seems impossible at first, yet the evidence looks undeniable in the lab. Now the danger may threaten thousands more"--Amazon.com.