"Tom Bracks is back in the fourth book in the series, and again another rogue doctor is on his trail. Is it the Russians again pursuing him to understand and replicate the micro-chip technology in his head or a new player with a similar pursuit?
When Tom is ambushed after dining out one evening with a friend it sparks a new adventure which eventually sees Tom become a 'guinea pig' so that he can track down the doctor at the centre of the mayhem."