Mack Reynolds 
Fracas Factor 

GUNS WERE ILLEGALUnless you were a member of Category Military, no one on Earth could own a gun. So who was shooting at Joe Mauser? And why?He’d been a mercenary, but he’d been thrown out when he saved Field Marshal Cogswell’s life. Whose enemies were after him now — his own, or Cogswell’s?In a world where the computers kept track of you, Mauser had to disappear — and stay alive long enough to reach the Field Marshal!