Supermind — Randall Garrett

In 1914, it was enemy aliens. In 1930, it was Wobblies. In 1957, it was fellow travelers. In 1971, it was insane telepaths. And, in 1973: "We don't know what the hell it is," said Andrew J. Burris, Director of the FBI. He threw his hands in the air and looked baffled and confused...