Norman Spinrad 
Agent of Chaos 

The Great Tyrant rules the solar system with absolute terror. Only one man dares to fight back.The time is the 24th century. Humankind populates the entire solar system from icy Pluto to boiling Mercury. Great domed cities, humming factories, hordes of workers, all feed the power of the dictatorship that controls all life. Only a small group among the cowed population dares rebel in a struggle that pits democracy against tyranny.But there is a third force at work as well. A mysterious band of assassins whose final solution to the problem of humanity’s fate is as terrifying as it is irresistible — one of them is known as the AGENT OF CHAOS.