The product is a collection of 20 mystery novels by Agatha Christie featuring the characters Hercule Poirot and Miss Marple. Published by Black Dog & Leventhal Publishers in 2007, these hardcover books are written in English and cater to a young adult and adult audience. The series falls under the genres of Crime & Thriller and Mystery, offering a captivating narrative for fans of literature and fiction. The books come with bookmarks and dust jackets, making them a valuable addition to any mystery book lover’s collection.