Edward Snowden, a young computer genius working for America's National Security Agency, blew the whistle on the way this frighteningly powerful organisation uses new technology to spy on the entire planet. The consequences have shaken the leaders of nations worldwide. This is the inside story of Snowden's deeds and the journalists who faced down pressure from the US and UK governments to break a remarkable scoop.From the day he left his glamorous girlfriend in Hawaii, carrying a hard drive full of secrets, to the weeks of secret-spilling in Hong Kong and his battle for asylum, Snowden's story reads like a globe-trotting thriller.