One, Two, Buckle My Shoe by Agatha Christie [Paperback]

A Harley Street dentist is found dead, shot with a pistol near his hand, in what appears to be a murder-suicide after one of his patients is also discovered dead from a lethal dose of anaesthetic. The scene suggests a clear case, but the mystery deepens: why would the dentist commit such a crime in the middle of a packed day of appointments? A single clue – a shoe buckle – holds the key to unraveling the truth. Now, it's up to Hercule Poirot to solve the riddle and set things straight, just like in the nursery rhyme.