Up above on the left is "ebooks" on the blue bar.
Click "ebooks" and the drop down menu shows options. You can choose "ePub" for the Sony. And you are taken to this page.
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You can choose the type genre you want from the drop down menu.
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I chose mystery and the list comes up from the beginning.
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On the right is a search option to look for specific books or authors. Just type it in and the search will bring it up.
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I typed in "doyle" and clicked "go".
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I hope this helps.