Bzrk by Michael Grant

In the near future, the conjoined Armstrong twins, under the guise of the Armstrong Fancy Gifts Corporation, plot to create their own version of utopia using nanobots, while a guerilla group known as BZRK develops a DNA-based biot that can stop bots, but at risk of the host's brain

Read the entire series:
  1. BZRK
  2. BZRK Reloaded
  3. BZRK Apocalypse