No Game No Life v.1 (Light Novel)
In a world where games decide everything - even national borders - a genius brother-sister duo aim to put their gamesmanship to the test to save humanity! Meet Sora and Shiro, a brother and sister who are loser shut-ins by normal standards. But in the world of gaming, this genius pair reigns supreme, their invincible avatar so famous that it's the stuff of urban legend. So when a young boy calling himself God summons the siblings to a fantastic alternate world where war is forbidden and all conflicts are decided by the outcome of games, Sora and Shiro have pretty much hit the jackpot. Will Sora and Shiro, two failures at life, turn out to be the saviors of mankind?