Joanna Penn
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E-book revolution: Breaking through in the digital age

22 August 2013 Last updated at 12:20 BST

The rise of digital books is revolutionising the global publishing industry.

But with many more authors appealing direct to the public by releasing their novels themselves over the internet, are any of them able to make money?

Philip Hampsheir reports on how to succeed in a world of limitless choice.