Mystery fiction focuses on solving a crime through a gripping plot. Let's examine the conventions that mysteries share, such as main plot, side-plot, hidden secrets, a strong central character, suspense, and a satisfying ending. Some of the finest examples through the ages include works by E. A. Poe, Sir Arthur Conan Doyle, Agatha Christie, and the Nancy Drew and Hardy Boys series. Mystery is a genre that keeps readers turning the pages and coming back for more.