Brainiac by Ken Jennings

From the Publisher:
One day back in 2003, Ken Jennings and his college buddy Earl did what hundreds of thousands of people had done before: they auditioned for Jeopardy! Two years, 75 games, 2,642 correct answers, and over $2.5 million in winnings later, Ken Jennings emerged as trivia's undisputed king. Brainiac traces his rise from anonymous computer programmer to nerd folk icon. But along the way, it also explores his newly conquered kingdom: the world of trivia itself.