Mac must crack a secret code that has been recovered from a double agent. A series of clues leads Mac to France and then to Japan, where he comes face-to-face with his arch-nemesis, the KGB man...and the world headquarters of Nintendo! Is the KGB Man secretly behind all of this? And are Mac's video-game skills good enough to face down his enemy at the Video Game World Championships?

Featuring historical facts woven throughout - and, of course, intrigue and hilarity - the fourth entry in the totally smart, wholly original, side-splittingly funny series from the wildly talented Mac Barnett shouldn’t be missed!