The Ellerby Case is a 1927 detective novel by John Rhode, the pen name of the British writer Cecil Street.

[2] The novel's success led to a contract with Dodd Mead to release it and subsequent novels in the United States, in what proved to be a lucrative arrangement for the author.

[4] Sir Noel Ellerby comes to visit Priestley to complain that his Lincolnshire manor house has been broken into, but nothing apparently taken.

Soon afterwards Ellerby is found dead at his home in front of an empty safe.

Priestley eventually discovers that his killing is linked to a racket concerning the distribution of contraband saccharine, but nearly loses his life in the process to the ruthless murderer.