Which one of the following phrases is not the title of a book by Agatha Christie?

"The Way to Dusty Death" was a novel by Alistair MacLean; all of the other phrases are book titles by Agatha Christie. The Maclean title was inspired by one of the more famous soliloquies in Shakespeare's tragedy Macbeth (5th scene of Act 5).

Dame Agatha Mary Clarissa Christie, Lady Mallowan, DBE (born Miller; 15 September 1890 – 12 January 1976) was an English writer. She is known for her 66 detective novels and 14 short story collections, particularly those revolving around her fictional detectives Hercule Poirot and Miss Marple. Christie also wrote the world's longest-running play, a murder mystery, "The Mousetrap", and six romances under the name Mary Westmacott. In 1971 she was appointed a Dame Commander of the Order of the British Empire (DBE) for her contribution to literature.

Alistair Stuart MacLean (21 April 1922 – 2 February 1987) was a Scottish novelist who wrote 29 popular thrillers and adventure stories. His works include "The Guns of Navarone", "Ice Station Zebra" and "Where Eagles Dare" – all three were made into popular films. He also wrote two novels under the pseudonym Ian Stuart and three non-fiction books. "The Way to Dusty Death" was published in 1973.

"The Way to Dusty Death" appeared as a 1995 made-for-TV movie directed by Geoffrey Reeve starring Simon MacCorkindale as Harlow and Linda Hamilton as romantic interest Marie MacAlpine. It is a classic thriller of mystery and adventure set in the world of 1970s Formula One racing.