Calibre 2.63.0 arrives two weeks after the release of the previous maintenance update, Calibre 2.62.0, which introduced support for the new Kindle Oasis ebook reader from Amazon, as well as reading and writing of EPUB 3 metadata. Unfortunately, there aren’t many interesting features added in the Calibre 2.63.0 release, except for the implementation of Unicode 9.0 support in the regex engine of the Edit Book feature that lets users edit books that contain characters encoded with the recently released Unicode 9.0 standard.