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Calibre 2.59 Has Better EPUB 3 Support, Amazon Metadata Download Improvements

Calibre 2.59 arrives after only one week from the release of Calibre 2.58, the previous point release that added compatibility with the latest Qt 5.x technologies (Qt 5.5 or later) on the Ubuntu Linux operating systems. And it looks like it introduces several improvements for the Amazon Metadata Download functionality.