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30% of the top-selling e-books on Amazon are self-published, beating out the biggest authors from the largest publishing houses in the world – as well as titles from Amazon’s own imprints (which aren’t included in the Indie Top 100). This roughly tallies with the limited data we do have from Amazon, who recently announced the top-selling Kindle Books of 2013 (January to March). Seven of the Top 20 were self-published (and that’s not counting formerly self-published work, or Amazon imprint books). - davidgaughran.wordpress.com