The Third Daughter by Agatha Christie

The novel "The Third Girl" was first published in 1966. This time Hercule Poirot faces a more unusual case than usual, since it all begins with a simple, but at first glance absurd phrase uttered by an unexpected guest Norma Restrick: "Perhaps I have committed murder." And although at this very moment the girl refuses Poirot's services, considering him too old, the latter decides to find out the truth. And each new fact discovered, in fact further complicating the seemingly simple chain of events, the identities of the people involved in the case and the motives for their actions, ultimately helps Poirot put all the pieces of this big puzzle in their places, and a completely unexpected picture appears before the reader.