Insignia by S.J. Kincaid

Isnignia by S.J. Kincaid is a great book set in a future book where all of earth is controlled by two companies, one of which controls the water, and the other owns the food. However these companies are trying to one-up each other in the wars they are fighting. However the weapons they use can destroy the ozone layer and evaporate all water on earth. So the companies devised a plan: to ship remote-control robots to mars or to a asteroid belt, and let people fight there. There robots are controlled by people with computers in their brains. they can use these computers to control many things- from battling robots to alarms. Although this would be fine, malware has become quite literally deadly.