The plot is a world of warcraft style MMORPG is linked to real world settings (such as airport security) to allow people playing the game to preform real life actions (in the book, the example was sound an alarm when they spotted a character travelling the wrong direction). The idea being, if it is a game (or simulator as you say) you can make it waaayyyy more interesting than the real life work.
Between him and Daniel Suarez these "near future" sci fi writers are getting scary good at predicting some things.
Any other authors are books would be much appreciated!