Calibre 2.9 发布，此版本现已提供下载，更新内容如下：
E-book viewer: Show footnotes in a separate popup window
Now when you click on a link to a footnote/endnote, the corresponding note is shown in a separate popup window, for convenient reference. Footnote links are recognized using the EPUB 3 footnote markup as well as some heuristics. Any superscript or subscript links are assumed to be footnote links. Any link that links to another file which in turn links back to the original link, is assumed to be an endnote.
Cover Grid: Improve scroll wheel based scrolling.
On windows and linux a single "tick" of the wheel now scrolls by about half a row instead of a full screen. On OS X, scrolling is pixel based, so as you scroll faster, more content is scrolled.
Get Books: Add the Bubok Portugal store
Performance improvement for large libraries that using custom columns built with templates
Review downloaded metadata dialog: Allow merging tags by long clicking the revert button
Fix a regression in 2.8 that caused the clear button next to date fields to set the date to Jan 101 instead of undefined.
Closes tickets: 1388061
Linux: Fix Unity global menu bar stops working after minimizing calibre to the dock or the system tray.
Closes tickets: 1389404
Sanitize the ImageMagick environment variables before launching external utilities.
Closes tickets: 1389449
Prevent stale 'On Device' info (from the previous connection) from showing during subsequent device connections
Conversion: Add workaround for converting EPUB files with syntactically invalid (probably hand edited) OPF files.
Closes tickets: 1389188
Fix e-book viewer not displaying cover from HTMLZ files.
Closes tickets: 1388595
Conversion: Handle input documents with crazy font sizes (1000pt +)
Calibre是电子书管理软件，支持Amazon、Apple、Bookeen、Ectaco、Endless Ideas、Google/HTC、Hanlin Song设备及格式，功能十分强大。