Terminal Man — Michael Crichton

Harry Benson suffers from violent seizures. So violent that he requires a police guard when entering a Los Angeles hospital for treatment.

Dr. Roger McPherson, head of the prestigious Neuropsychiatric Research Unit, is convinced he can cure Benson through a procedure_ known as a stage three. During this highly specialized surgery, electrodes, placed deep, in Benson's brain, send monitored soothing pulses to its pleasure canyons.

The operation is a success -- until Benson discovers how to get the pulses with increasing frequency. Then he escapes from the hospital and lapses into murderous rampages, becoming a homicidal maniac with a deadly agenda....