Forbidden Area

Forbidden Area is a 1956 Cold War thriller novel by Pat Frank.

Its plot involves Soviet sleeper agents intended to sabotage the U.S. war effort, who have been trained by classical conditioning to have an American "cover identity" that they can remember as well as their own.

He said he was inspired by German troops landing in Florida in World War Two.

[4] In October 1956, CBS broadcast an adaptation of the novel as the first episode of its Playhouse 90 series.

[5] In 1963, it was announced Irving Asher and Ely Landau would turn the novel into a film.