John Scarne - Cheating In Gambling Exposed

John Scarne used to be the world's foremost authority on gambling， and particularly cheating at gambling， but he was not a gambler himself.
He was one of the best sleight-of-hand performers in the world， particularly with a deck of cards.
He achieved his fame through hard work from a very early age.
He travelled throughout the military during World War II， teaching the soldiers how to keep from getting cheated at card and dice games.
Scarne was a brilliant mathematician as well.