New Features
• Quick view window: Allow the quickview window to be docked into the main calibre window.
• Add empty book: Allow setting the title as well as the author and series for the added empty book records
• Windows driver for Grammata Papyre 602.
• Edit Book: Add an option to turn off auto-completion of closing tags
• Allow adding a description for custom columns.
• Book Details panel: Allow any identifier of the form url+number to become a clickable link. For example: Bug Fixes
• Conversion: Convert entities that reference non-BMP unicode codepoints on Windows and OS X correctly. Linux was not affected by this bug.
• Edit Book: Do not autocomplete the closing tag wen typing the / key inside an existing tag.
• Fix Booken Lev e-book reader not being detected in OS X and Linux.
• DOCX Input: Change handling of sequences of space characters to more closely follow Microsoft Word.
• Edit Book: Fix Table of Contents editor not remembering its saved state across calibre sessions
• Edit book: Disallow drag and drop of documents onto the preview panel to workaround crashing bug in Qt.
• E-book viewer: Fix current page not being preserved when opening and then immediately closing the footnote window.
• PDF Output: Fix incorrect encoding for some chinese characters in the PDF Outline (Table of Contents)
Improved news sources
• FAZ.net
• Indian Express
• CNN

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Allow opening ebook files and covers in external applications by simply right clicking on them in the Book Details panel.
Now, you can right click on an ebook format or the cover in the Book Details panel, and open it with any application installed on your computer. calibre will automatically present you with a list of application capable of opening the file. Simply choose one, or if your particular application is not auto-detected, you can browse for it manually.

Tag Browser: Make rename and delete for items in the Tag Browser restrict themselves to the current Virtual Library (if any). There is also an additional menu entry you can use to rename and delete across all books while in a Virtual Library.
Conversion: Use a new (written from scratch) implementation of CSS Level 3 selectors that fixes various bugs in handling of the more advanced/uncommon CSS selectors such as nth-last-child()
Edit Book: Allow restoring of disabled confirmation prompts in preferences and add a confirmation when removing saved searches
Edit ToC button: Remember the last used ebook formats
Bug Fixes

E-book viewer: Fix regression that prevented pasting of text with formatting from the viewer.
Closes tickets: 1428018

Table of Contents Editor: Fix selecting a location inside a file and then clicking on another file causes the previous location to be used in the new file.
Closes tickets: 1428212

DOCX Input: Fix incorrect bold font weight being used for heading styles even if the style definition does not specify bold.
Closes tickets: 1430831

AZW3 Input: Fix a bug that prevented conversion of AZW3 files that contained an empty CSS media block.
Closes tickets: 1426220

PDF Output: Fix incorrect rendering of text in elements that use font-variant:small-caps and also have children.
Closes tickets: 1425094

Get Books: Update Amazon Europe, Empik and CDP store plugins
PDF Output: Fix incorrect conversion of source document that specify dir='rtl' on the root element.
Closes tickets: 1429292

PDF Output: Ignore unparseable links instead of aborting the conversion on them.
Closes tickets: 1429282

Fix reading metadata from filenames tester not working for dates before 1900.
Closes tickets: 1424607

Linux binary install: Fix SSL CA certificates not being detected on Fedora based distributions
Books list: Fix column alignment incorrectly propagating when changing libraries
FB2 Input: Do not put a border around images
Fixes for various incompatibilities with (Py)Qt 5.4.1 which is used by some calibre distro packages on linux
Fix error when running calibredb backup_metadata on a library that contains book records with no path information
Edit Book: Fix extra search being hidden when removing a saved search
Fix a regression in 2.20 that prevented some changes to per-library preferences from being saved
Linux installer: Do not register application/octet-stream as one of the mimetypes calibre can handle
New news sources

Pando Daily by Darko Miletic
Improved news sources

Spektrum der Wissenschaft
New Musical Express
The Daily Mirror

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New Features
• Book List: When editing data in the book list directly, expand the editor widget to use all available width if the data does not fit inside the current column width
• Edit Book: When re-opening a previously edited book, restore all open files and the cursor position. Can be disabled in Preferences->Main Window
• Advanced search builder: Allow using days/weeks/months/years when building a date based search with number of days ago.
• Amazon metadata download: Speedup metadata download from amazon.com when an ASIN is specified by trying the product page directly first instead of running a search.
• Implement updating metadata in DOCX files
Bug Fixes
• ODT Input: Add support for intra-document cross-references.
• PDF Output: Fix incorrect encoding of ASCII control characters and some Chines characters in metadata and Table of Contents strings.
• Amazon metadata download: Work around amazon server problems where it does not return Kindle Editions in search results when not logged in.
• Fix Manage Authors dialog causing current search in the book list to be cleared.
• Conversion: Fix a regression in 2.21 that caused conversion to fail for books with invalid pseudo-class CSS selectors.
• Content server: Fix OPDS categories not showing books for composite column categories if the column contains a colon.
• Single convert dialog: Only write metadata updates if metadata actually changed. Also show a nicer error message when a file is locked by another process.
• Open With: Fix error when scanning for default programs on windows for some file types
• Edit Book: Fix Preview panel sometimes not working when opening multiple html files one after the other very quickly
Improved news sources
• Wired Daily

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New Features
• Allow adding an empty ebook in various formats to existing book records by right clicking the Add Books button
• Add ability to create additional empty formats to the 'Add empty book' command
• News download: Add API to cleanly abort the download of an article during the preprocess stage based on the article's contents.
• Update the version of Qt bundled with calibre to 5.4.1. This fixes various minor bugs, most notably, improving text rendering on linux.
Bug Fixes
• MOBI Input: Fix links not working in viewer for MOBI files that contain anchors placed on linebreak elements.
• Book details panel: Fix copying Path link by right clicking on it not working.
• Fix a regression that caused importing of a single book from a directory to fail if the directory has no ebook files in it
• Column Icons: Fix apostrophes in icon filenames causing errors.
• Edit Book: Fix a regression that caused Remove unused CSS to fail on invalid CSS selectors, instead of ignoring them
• Open With: Fix open with failing to get list of default programs on windows if the registry contains missing ProgIDs.
Improved news sources
• Esquire
• Courrier International
• CNET
• Tagesschau

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New Features
• E-book viewer: Add an option to not save the bookmarks inside EPUB files, under the Miscellaneous section of the viewer preferences
• Manage User Categories: Allow restricting the visible items to only those present in the current Virtual Library (if any)
• Book details panel: Allow copying full path to ebook files by right clicking on the format link.
Bug Fixes
• Edit Book: Fix GIF format images being corrupted when using the builtin image editor to make changes to them.
• Edit Book: When dragging and dropping files to re-order them in the file browser, fix the final order being dependent on the order the files were selected in.
• Conversion: Fix error when converting a document that contains an invalid function based CSS selector without parentheses.
• Edit Book: Fix regression that caused pressing Alt+X to type unicode characters to not work
• Device view: Preserve position in list of books when deleting books from the device view
• Make the context menu for the book details popup window work the same way as for the book details panel
• Get Books: Update amazon store plugin for website changes
• PDF Metadata: When choosing between reading metadata from the Info dict and the XMP block, consider both the MetadataData and the ModifyDate in the XMP block, since there exist PDF metadata writing tools that update one and not the other.
• Fix a regression that caused ebook viewer to remember the state of the Table of Contents panel when quitting on OS X.
• Prevent Enter key on Manage authors/tags/etc. dialogs from closing the dialog.
Improved news sources
• Le Temps
• United Daily
• Liberty Times
• Apple Daily
• China Times
• House News
• Providence Journal
• Harvard Business Review

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New Features
• Edit Book: Make embedding fonts using the manage fonts dialog easier. You can now double click on a font family to see what faces for that family area available on your computer and install new fonts directly from the dialog.
• Book Details panel: Allow deleting tags/series/publisher/etc. by right clicking on the link in the book details panel.
• E-book viewer: Allow expanding/collapsing all items in the Table of Contents view by right clicking
• When using the View specific format action add an 'Open With' button to choose a specific program to view the specified format
• Fetch News: Add API to allow recipe writers to easily resolve internal links to point to the downloaded versions of articles
• DOCX Input: Add support for DOCX files created by Word 2013 in 'Strict' mode
• When getting cover from comic files, use smart filename sorting to find the first filename, recognizing numbers inside the filenames.
Bug Fixes
• E-book viewer: When displaying multiple pages per screen fix whole screen scrolling so that it works as expected even at the end of the file, when their might be fewer pages left than would fill the screen.
• DOCX Input: Automatically resize large images used as bullets in lists, to compensate for the fact that HTML renderers do not do this.
• Book list: Prevent yes/no columns from making the minimum row height too large.
• Template language: Fix raw_field() function returning incorrect values for lists
• Edit book: Fix book locale changing when OPF edited if OPF contains a country code in addition to a language code
• Edit Book: Fix escaped HTML tags in the comments metadata being reported as mis-spelled words.
• Edit Book: Fix regression that caused copying of non-breaking spaces to not work when using the keyboard shortcuts
• Open With: Fix open with not working for programs from the Microsoft Office suite
New news sources
• MIT Technology Review Magazine by Michael Marotta
• The Codeless Code by April King
Improved news sources
• Die Zeit
• NZZ Webpaper
• Arcamax

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New Features
• Driver for the soon to be released Kobo Glo HD
Bug Fixes
• Do not use a separate process to draw the splash screen. This might fix the issue of calibre randomly freezing on startup on a few windows systems
• MOBI Ouput: Fix :first-letter applied to elements containing a comment causing conversion to fail
• Properly display names of libraries containing the ampersand character.
• When sorting filenames in comics treat the file extension as a secondary sort key. Fixes xyz.jpg sorting before xyz_1.jpg
• Fix a regression in 2.25 that broke the search & replace wizard in the conversion dialog when converting a book with multiple formats
• Content server: Fix errors when library contains enough virtual libraries to cause grouping.
• Manage tags dialog: Fix setting a tag to empty causes an unhandled error.
• E-book viewer: Fix a regression that caused the viewer to occasionally skip the last page in a chapter when displaying more than one pages per screen and scrolling by screen
• Edit Book: Fix open OPF file not being refreshed when deleting items from the file browser.
New news sources
• Discover Magazine Monthly by Michael Marotta
Improved news sources
• WirtschaftsWoche Online
• Wired
• CNN

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New Features
• Edit metadata dialog: Add a clear button for the publisher.
• DOCX Input: Add option to not insert page breaks between endnotes.
• calibredb list: Allow outputting the book languages as well.
• Italian translation of Quick Start Guide
• Embed metadata: When embedding metadata fails for some books, add an option to show the failed books in the book list
• Animate the main toolbar when a device is connected/disconnected, to indicate that the contents of the toolbar have changed
Bug Fixes
• E-book viewer: When printing, print to a PDF file instead of directly to the printer. This fixes printing not working on some systems.
• AZW3 Input: Handle kindlegen produced azw3 files that do not use normal HTML anchors for linking.
• Fix too many open files errors that could occur in a few places on OS X
• Do not allow user to hide all columns in book list via the context menu, as restoring them becomes difficult

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New Features
• Conversion of all ebook formats to Microsoft Word (DOCX) files
Supports conversion of text styles, images, lists, tables, embedded fonts, etc. Produces DOCX files compatible with Microsoft Word 2007 or newer. Note that this code is very new, so there will likely still be kinks that will be worked out in the coming weeks.
• Add keyboard shortcuts (Ctrl+Right, Ctrl+Left) to switch between virtual library tabs.
• When sending email using GMX pause for five minutes between books, to prevent GMX from blocking the account. The delay can be configured via Preferences->Tweaks
Bug Fixes
• Open With: Fix application icons in XDG_DATA_HOME on linux not being found and fix unhandled error when choosing non-executable files as applications.
• AZW3 Output: Remove duplicate anchors to workaround some Kindle renderers using the last occurrence of an anchor as the target instead of the first.
• Fix language definition on body tag being ignored during conversion
• Edit book: When importing multiple files into the book, import them in the order sorted by their filenames instead of in random order
• E-book viewer: Fix print to pdf not working on some windows systems with non-ascii usernames and non-utf-8 system locales. Also make the print to pdf dialog a little easier to use.
• Edit Book: Fix TOC editor window not remembering its last used size
Improved news sources
• Field and Stream
• Linux Magazine
• Brand Eins
• Courrier International
• Wired Magazine
• The Onion

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New Features
• Allow opening the full Tag Editor dialog directly from the book list by holding down the Shift key while starting an edit of a tag-like field. For example, click on the tags field for a book and press Shift-F2
• Tag Browser: Allow undoing the deletion of items in the Manage categories window
• calibredb add: Allow setting arbitrary identifiers, not just ISBN.
• Add a 'Retry' button to the news download failed error message.
Bug Fixes
• DOCX Output: Detect the common idiom of placing centered images as inline images inside a containing centered block and render the resulting image as a floating centered image in the DOCX file.
• DOCX Output: Fix incorrect handling of bold/italic in paragraphs where the majority of text is either bold or italic instead of normal
• Table of Contents editor: Fix save/load of settings in the XPath wizard not working across restarts
• Get Books: Update the Kobo Store plugin for website changes
Improved news sources
• Popular Science
• General Knowledge Today
• Scientific American
• Wired Magazine

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