Crux

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 assassinations, and finds himself in a maze with no way out. The first blows in the war between human and post-human have been struck. The world will never be the same.