Crux (Nexus Trilogy #2)

Finalist for the 2014 Prometheus Award.

Six months have passed since the release of Nexus 5.  The world is a different, more dangerous place. 
 
In the United States, the terrorists – or freedom fighters – of the Post-Human Liberation Front use Nexus to turn men and women into human time bombs aimed at the President and his allies. In Washington DC, a government scientist, secretly addicted to Nexus, uncovers more than he wants to know about the forces behind the assassin…