Mark Cuban has 335,000 friends on Facebook and 760,000 followers on Twitter. Monday, the Internet billionaire and owner of the Dallas Mavericks basketball team will test just how friendly those fans really are. Mr. Cuban has written a 30,000-word e-book, "How to Win at the Sport of Business: If I Can Do It, You Can Do It". To drive sales, Mr. Cuban plans to tap all his online followers.
Alan Murray
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