
Hier einige Beispiele:

The Mysterious Affair at Styles: Poirot and Hastings investigate the crime scene – forming the skull, as the murderer used poison. The whole stamp is then reproduced in miniature on the poison bottle.

Murder on The Orient Express: Don’t be distracted by the red kimono character, she distracts the viewer from the killer hidden behind a heat sensitive ink curtain. The curtain disappears when the stamp is touched, and names of suspects are written along the train track in micro text.

And Then There Were None: A poem, key to the plot, is the moon’s reflection, and the mysterious U.N.Owen appears at the lit window.
Gut gemacht ist auch das "Presentation Pack" mit diverser Information zur "Queen of Crime":

https://www.creativereview.co.uk/royal- ... ie-stamps/