The Murder on the Links, by Agatha Christie (with bonus short story) (epub/Kindle/pdf)
"The Murder on the Links" 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. Reviews when it was published compared Mrs Christie favourably to Arthur Conan Doyle in his Sherlock Holmes mysteries. Remarking on Poirot, still a new character, one reviewer said he was "a pleasant contrast to most of his lurid competitors; and one even suspects a touch of satire in him."