The Mysterious Affair at Styles is a detective novel written by Agatha Christie and is considered to be her debut novel. It introduces the character of Hercule Poirot, who is one of the most famous and enduring characters in crime fiction. The book is a classic of the genre and is known for its intricate plot, cleverly concealed clues, and surprising twist ending. Additionally, it is a great example of Golden Age of Detective fiction. Reading it will be an enjoyable experience for fans of detective stories, and it will also give you an insight into the mind of one of the greatest mystery writers of all time.