07/20/2010 03:58 pm ET | Updated May 25, 2011

Amazon's eBook Sales Claim: What's Really Behind The Numbers?

In case you missed it, Amazon told the world yesterday that for the last three months it was selling more e-books than hardcover books and in the last month it sold 180 digital books for every 100 hardcover copies. It was one of those great self-serving press releases that had a terrific headline and all the blogs and major newspapers jumped on it.

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