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The Kindle effect? Has the Kindle effected US e-book sales?

Whilst tracking Kindle sales is like guess work, tracking US e-book sales is a bit easier, the above graphic shows US e-book sales from Q1 2002 – Q1 2008. Whilst there was a healthy upward trend, the last 5 quarters (Q4 2006 – Q4 2007) only showed a 17% increase in sales according to industry […]