This is the world of nano technology a young adult novel of twenty-first century warfare in the human ecosystem, a fight for control.  Michael Grant has begun a new series in the computer game world on a micro scale where the human body is the battle ground.  There are also conflicts on the macro level, the regular life.
Vincent is the greatest nano warrior alive.  Noah and Sadie are recruited into this world into a secret cell not knowing what they are getting into.  Trained for a war they have no idea existed and can barely grasp the technology because it is so new.  Sadie's father pioneered much of it to aid medicine in healing severe conditions such as cancer and to fix the aneurysm Sadie has in her brain.  However when others weaponize the new technology a dark conspiracy emerges.  It is just a group of teen hackers who call themselves BZRK who are trying to save world leaders.  It is victory or madness.  This is a suitable fiction read for science units on robotics, nano technology and computer science.