Full Time Gambler
L.G. Holloway was the quintessential professional gambler.  Not only did he make his living on the casino floor he was also an avid reader on the subject of gaming.  He built his credentials as a winner quietly and unassumingly so as not to be pegged as a "hustler."  His poker face was so strong that it wasn't until his book was released that he became recognized as the authority on successful gambling techniques.