A Berlin mystery for all ages: Emil and the Detectives author Erich Kästner was a writer who wouldn't bow to the Nazis
On 10 May 1933, Nazi activists burned piles of "decadent" books on the Opernplatz in Berlin. Many people know about that night of shame: a foretaste of future horrors. Not so many know that one of the most prominent victims was there to watch his work consigned to the flames - until a Nazi spotted him, and he made himself scarce.