FBI Agent Malone has a problem. Someone is reading the minds of the nations top scientists, stealing the most vital secrets from the closely guarded new spacedrive project. Now Agent Malone must find another telepath who can catch the spy. The future of all mankind could depend on his success or failure. And his best prospect is a sweet little old lady who believes she is Queen Elizabeth I. Brain Twister is one of the most suspenseful—and intriguingly funny—science fiction novels to come along in many a year.
First book publication 1962
A shorter version of this work appeared in Astounding Science Fiction under the title That Sweet Little Old Lady.