The Undetected is a science fiction novella by George O. Smith first published in 1959.

Nothing can possibly be more baffling than a crime in a sealed room...

but what if the investigator happens to have an open mind?

The Undetected was first published in Galaxy Science Fiction December 1959.

George Oliver Smith (1911-1981) (also known by the pseudonym Wesley Long) was an American science fiction author. He is not to be confused with George H. Smith, another American science fiction author.

Smith wrote mainly about outer space, with such works as Operation Interstellar (1950), Lost in Space (1959), and Troubled Star (1957). Smith continued regularly publishing science fiction novels and stories until 1960. He was given the First Fandom Hall of Fame award in 1980.