I just bought a book called Endgame, The Calling, by James Frey and Nils Johnson-Shelton.  It is about a group of teenagers who have been chosen.  They are placed in different parts of the world and they have to enter the game to save the world.

‘Twelve ancient cultures were chosen millennia ago to represent humanity in Endgame, a global game that will decide the fate of humankind. Endgame has always been a possibility, but never a reality…until now. Twelve meteorites have just struck Earth, each meteorite containing a message for a Player who has been trained for this moment. At stake for the Players: saving their bloodline, as well as the fate of the world. And only one can win.’

The other very interesting point is that there is prize money of $500,000 hidden somewhere in the world and whoever can solve the puzzles in the book will get the key to find the money!!