Agatha Christie wrote The Mysterious Affair at Styles during the midst of World War I. The book was published in 1920 and became extremely popular because of the well-grounded plot and interesting characters. The novel is set at Styles Court, a wealthy estate in England during the war. The estate's owner, Mrs. Cavendish, had inherited the estate as well as vast sums of money from her late husband.

This mystery novel follows Anthony Cade, a man who unknowingly finds himself in the middle of an international conspiracy and a murder investigation after accepting a simple delivery job from an old friend. As Cade slowly begins to realize his predicament has potentially put him in danger, he begins his own investigation into the strange series of events just as Inspector Battle of Scotland Yard begins the main, official investigation.

In a remote house in the middle of Dartmoor, six shadowy figures huddle around a table for a seance. Tension rises as the spirits spell out a chilling message: "Captain Trevelyan...dead...murder." Is this black magic or simply a macabre joke? The only way to be certain is to locate Captain Trevelyan. Unfortunately, his home is six miles away and, with snowdrifts blocking the roads, someone will have to make the journey on foot....

Miss Marple encounters a compelling murder mystery in the sleepy little village of St. Mary Mead, where under the seemingly peaceful exterior of an English country village lurks intrigue, guilt, deception and death. Colonel Protheroe, local magistrate and overbearing land-owner is the most detested man in the village. Everyone—even in the vicar—wishes he were dead. And very soon he is—shot in the head in the vicar's own study. Faced with a surfeit of suspects, only the inscrutable Miss Marple can unravel the tangled web of clues that will lead to the unmasking of the killer.

Pretty, young Anne came to London looking for adventure. In fact, adventure comes looking for her - and finds her immediately at Hyde Park Corner tube station. Anne is present on the platform when a thin man, reeking of mothballs, loses his balance and is electrocuted on the rails. The Scotland Yard verdict is accidental death. But Anne is not satisfied. After all, who was the man in the brown suit who examined the body? And why did he race off, leaving a cryptic message behind?