Murder on the Links

The Murder on the Links is a work of detective fiction by Agatha Christie, first published in the UK by The Bodley Head in May 1923, and in the US by Dodd, Mead & Co in the same year. 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.