The Murder on the Links by Agatha Christie.  The Murder on the Links is a work of detective fiction by Agatha Christie, first published in the US by Dodd, Mead & Co in the same year and in the UK by The Bodley Head in May 1923. It features Hercule Poirot and Arthur Hastings. The story takes place in northern France, giving Poirot a hostile competitor from the Paris Sûreté. Poirot's long memory for past or similar crimes proves useful in resolving the crimes. The book is notable for a subplot in which Hastings falls in love, a development "greatly desired on Agatha's part... parcelling off Hastings to wedded bliss in the Argentine.

The Man in the Brown Suit by Agatha Christie. The Man in the Brown Suit is Agatha Christie at her best, as a young woman makes a dangerous decision to investigate a shocking “accidental” death she witnesses at a London tube station. 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: "17-122 Kilmorden Castle"?