The Mysterious Affair at Styles is a cozy antique mystery book written by Agatha Christie. Set in the early 20th century, this captivating novel introduces readers to the brilliant detective Hercule Poirot. When an elderly wealthy woman is found dead in her country estate, Poirot is called upon to solve the perplexing case. With its intricate plot, well-developed characters, and charming vintage setting, this book is a must-read for fans of cozy mysteries and antique-themed stories.