Hey Mystery Writers! The U.K. Royal Mail Service is honoring Agatha Christie with stamps illustrating key scenes in six of her famous mysteries. The stamps offer hidden clues in microtext and UV and heat-sensitive inks for mystery-lovers. The stamps honor the 100th anniversary of the completion of her first novel, The Mysterious Affair at Styles, in which she created the inimitable Hercule Poirot. Enjoying checking out the story on Slate.com and see pictures of the cool stamps!!