The terminal man - Michael Crichton

Harry Benson is a man troubled by violent seizures and blackouts, with grave doubts about what occurs during those lost hours. When two surgeons approach him with a drastic new treatment for his extreme fits he leaps at the chance, even though it means having electrodes planted deep into his brain. The surgeons are so obsessed with trying out their new theory they ignore warnings from another doctor that the man they are about to experiment on is a psychopath, who believes there is no difference between man and machine. It is too late when they realise what kind of monster they've unleashed on the world...

The Terminal Man is a fast-paced thriller about the grave danger of technology falling into the wrong hands, from the master storyteller behind Jurassic Park and The Andromeda Strain.