"The Unexpected Guest" is an exciting detective story written by the famous British writer Agatha Christie. In this book, readers travel to a castle estate where a mysterious murder takes place. The main character, who independently decides to solve the case, meets an unexpected guest - a witness or a possible criminal. An exciting plot, an exquisite plot and an unpredictable final plot make this book a true literary masterpiece. "The Unexpected Guest" is a work that keeps you in suspense from the first pages and does not let you go until the last page.