In this week's Book Club podcast, my guest is the historian Katja Hoyer, whose new book Beyond The Wall: East Germany 1949-1990 tells the story of four decades which are vital to understand modern Germany, but which tend to be quietly relegated to a footnote in history. Born in the GDR herself, Katja tells me how much more there is to the East German state than the Berlin Wall, the Stasi, and the grey totalitarian dystopia of popular imagination. She tells me about Erich Honecker's wild side, about the importance of coffee to East German morale, and about how inevitable or otherwise were the historical forces that saw Germany first divided, and then reunited.