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.

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.

Anne Beddingfeld is always ready for an adventure. So when she witnesses a man wearing a brown suit die at a tube station in London, she searches for clues and finds a mysterious piece of paper nearby. The message it contains leads her on a confounding chase full of secret aliases and codes as she seeks to solve the case and catch the murderer. Featuring an appearance from Secret Service agent Colonel Race, this story from renowned mystery writer Agatha Christie is a true classic that blends adventure and suspense with the detective story.

As Miss Marple sat basking in the Caribbean sunshine, she felt mildly discontented with life. True, the warmth eased her rheumatism, but here in paradise nothing ever happened. Eventually, her interest was aroused by an old soldier's yarn about strange coincidence. Infuriatingly, just as he was about to show her an astonishing photograph, the Major's attention wandered. He never did finish the story....

Miss Marple, Agatha Christie’s deceptively mild spinster sleuth, is being treated to a few days’ holiday by her niece, staying at Bertram’s Hotel, a dignified, unostentatious establishment tucked away in a back street of busy Mayfair. Here is a place where sedate upper class ladies, retired military gentlemen and the higher echelons of the clergy can indulge in the comforts of a bygone age. But Miss Marple begins to feel uneasy. Something sinister lurks beneath the polished veneer.