The Berlin Wall fell a quarter of a century ago. Then we began to find out what had been happening in East Germany. This book, which won the Samuel Johnson prize in 2004, has been re-released; it might be the best account of the strange, secretive place on the other side of the wall. Anna Funder has described East Germany, and its secret police force the Stasi, in an accessible way. She tells us about her own feelings and gets people to tell their stories. This is about what it feels like when anybody might be a spy and everybody feels spied on. Could it ever happen again? Oh dear, you keep thinking.