We found this secret book in Valve's office in Bellevue, Washington, USA during The International 2012 tournament. Curious what secrets do they hide? Well simply watch our video! powered by www.navi-gaming.com Subscribe to Natus Vincere's YouTube channel if you like our videos: www.youtube.com/user/natusvinceretv?feature=watch Find us in social networks: facebook.com/natusvincere twitter.com/natusvincere vk.com/natus.vincere steamcommunity.com/groups/Natus-Vincere