Subversives! They lurk everywhere! They could be anyone, from the kindly couple next door to the innocent seeming nuclear researcher mailing thick bundles to Moscow every week, from your child’s teacher to the President himself! Even you could be an unsuspecting brainwashed puppet of the enemy!
There have been many noteworthy works about the hidden enemy. Some were even readable. Many will be reviewed.
Feel free to comment (and make suggestions!) here.
1: Foreshadowing: the mark of quality literature.