Arnold Snyder is the world's foremost authority on blackjack and one of its greatest players. Snyder is the author of nine books and advanced strategies on the game including The Blackjack Formula, the groundbreaking work which revolutionized the ways professional card counters attacked the games, and of course, the best-selling classic, Blackbelt in Blackjack. For 23 years, he was the publisher of the highly respected Blackjack Forum, a quarterly journal on gambling for professional players. In January 2003, in recognition for his contributions to the game, Arnold was elected one of the seven charter members of the Blackjack Hall of Fame. Arnold is a high-stakes professional player who has been writing about casino blackjack for well over two decades.Snyder, Arnold is the author of 'Blackbelt in Blackjack Playing 21 As A Martial Art', published 2005 under ISBN 9781580421430 and ISBN 1580421431.