Luke Harding is an award-winning foreign correspondent with the Guardian. He has reported from Delhi, Berlin and Moscow and has also covered wars in Afghanistan and Iraq, Libya and Syria. Between 2007 and 2011 he was the Guardian’s Moscow bureau chief; the Kremlin expelled him from the country in the first case of its kind since the cold war. He is the author of Mafia State and co-author of WikiLeaks: Inside Julian Assange’s War on Secrecy, The Liar: The Fall of Jonathan Aitken (nominated for the Orwell Prize) and The Snowden Files. Two of Harding’s books have been made into films; The Fifth Estate and Snowden. Luke’s book A Very Expensive Poison is an exposé of the events behind the notorious death of ex-FSB Officer Alexander Litvinenko, and has been adapted for a stage play at The Old Vic from this August. His latest book Collusion, reached #1 in the New York Times bestseller list.