Britain creates a series of stamps embedded with hidden clues to honor Agatha Christie. On September 25, 2016 By peanutgallerynhIn Europe,, Media and Culture, Now that is cool. Britain creates a series of stamps embedded with hidden clues to honor Agatha Christie. Share this: Share on X (Opens in new window) X Share on Reddit (Opens in new window) Reddit Share on Facebook (Opens in new window) Facebook Like Loading... Related