The Scorpio Letters is a 1964 thriller novel by the British writer Victor Canning.

[1] Following this stand-alone novel he began his Rex Carver series with The Whip Hand the following year.

George Constantine is a friend of a professor being targeted by a blackmail ring, which is similarly threatening three other prominent British figures - a politician, a businessman and an actress.

Joining forces with the actress' daughter, Constantine sets out to tackle the gang behind the operation, a mission that takes them across France and Switzerland.

Directed by Richard Thorpe it starred Alex Cord, Shirley Eaton and Laurence Naismith.