"The Mysterious Affair at Styles" - is Agatha Christie's very first novel. In this book, published in 1920, the reader first encounters the most famous detective of the 20th century, the whiskered Belgian Hercule Poirot, as well as his friend and assistant Hastings. It was here that Poirot was first given the opportunity to demonstrate his deductive abilities and solve a mysterious crime, based on well-known facts.
