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????Subscribe to the channel so you don't miss new books!! ????more books here: https://boosty.to/knigilub ????????The famous physicist Sir Claude Amorey turns to the great detective Hercule Poirot for help, who is sure that he is in danger. The little Belgian immediately calls his old friend and partner, Captain Hastings, and they rush to the scientist's house. However, Poirot does not have time to see Emory - he is poisoned. At the same time, the formula for the super-powerful explosive he discovered has disappeared. But the circumstances of the crime were such that it was committed in a room, and none of those present in it had yet left the house. So the killer is still here...