于丹教授随后把她的演讲内容结集出版为售价3美元的书，这本书的销售量为之前畅销书《哈利波特与魔法石》的两倍多，达到惊人的四百万本。
Professor Yu Dan then wrote a $3 book based on her lectures, which sold 4 million copies, more than double the sales of the previous bestseller, "Harry Potter and the Sorcerer's Stone."
类似于苹果这样的大公司，Facebook这样的超级成功的网站，《四小时工作周》这样的畅销书，他们都有一个共同点：他们起始于一个百万美元想法。
Big companies like Apple, super successful websites like Facebook, and bestselling books like The 4-hour Workweek all have one thing in common: They begin with a million dollar idea.
Waterstones在英国也是这样做的，一些畅销书开始卖到几十万甚至几百万册。
Waterstones did the same thing in Britain and top titles started selling in the hundreds of thousands, even millions.
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