Agatha Christie. Set of 2 books (Murder on the Orient Express; Halloween Party)

Murder on the "Orient Express" The great detective Hercule Poirot, who was in Istanbul, is returning to England on the famous "Orient Express," which appears to host representatives of all possible nationalities. One of the passengers, an unpleasant American named Ratchett, asks Poirot to be his bodyguard, as he believes someone is going to kill him. The famous Belgian brushes off this absurd request. The next day, the American is found dead in his compartment, with the doors locked and the window open. Poirot immediately takes up the investigation - and discovers that the compartment is full of various clues pointing... almost to all passengers of the "Orient Express." Additionally, the train is completely stuck in snowdrifts in a desolate area. Poirot must find the murderer before the express continues on its journey… 

Halloween Party Writer Ariadne Oliver is invited to a friend's house, where preparations for the Halloween celebration - a fun carnival for children and adults - are in full swing. One of the guests is a teenage girl known for her love of telling outrageous stories about all sorts of mysteries. Now she has astonished those present with a tale that she once witnessed a real murder! No one believed her. And suddenly, that same evening, she was found... drowned in a bucket of water and apples! Damn strange. Who would want the girl's death? Perhaps she actually saw something that posed a danger to someone present at the party? In any case, Hercule Poirot, who agreed to help Mrs. Oliver, his old acquaintance, faced a challenging task of unmasking the murderer and revealing his face to society…