Calibre

There is no option to change the default location of the Calibre library in the built-in UI, but you can edit the config file to do this.

Calibre stores its default library path in global.py.json. You can change it directly:

Go to Windows: %APPDATA%\Roaming\calibre\global.py.json

"library_path": "C:\\Books\\Library",

Change the path to your new library location

How do you manage the same book with different editions in Calibre? (Like US, UK, Illustrated, Portuguese Translated, ...)

I think they should all belong to the same folder, but that's not how Calibre works. Is there any way to keep books organized after "Save to Disk"? (I use Kavita)

Hi everyone! I bought some books from the Kobo store and they come with Adobe's DRM (ADE). I tried using the noDRM plugin (10.0.10 and some other fork 10.0.20) with the latest version of Calibre, but it didn't do anything. Then I tried downgrading to something like 8.7, still the same. Downgrading even further resulted in some Python versions mismatch and I couldn't be bothered to resolve it. Trying oboK threw errors because it needs (?) the Kobo desktop program. Trying the ACSM plugin seemed promissing as it was able to create an anonymized ID, but importing the files yet again didn't do anything... No errors, nothing.
Is there anythign else I could attemp besides booting into Windows?
Thanks!

New features

Full text search: A new cards based view of full text search results with book covers
To perform a full text search, click the "FT" button on the left of the search bar. The old compact result view can be re-activated by clicking the button to the left of the search bar in the Full text search window.

A new "word-prefix" completion mode that shows matches that have any word starting with the typed in letters
Closes tickets: 2144422

Bookshelves: Add option to have the height of books be constant per group
Edit book: File list: Allow using Ctrl+Left/Right to move an item to top/bottom of the list
Bug fixes

Fix notes being lost when changing the lookup name of custom column
Closes tickets: 2146404

E-book viewer: Fix using the slower/faster buttons causing a chapter skip when using the Piper neural speech backend
Content server viewer: Fix annotations being not synced to the server in some Android devices when using the Firefox browser
Windows: Force kill calibre.exe on quit to workaround hang in interpreter shutdown on some systems
TXT Output: Fix asciiize option not applying to generated inline Table of Contents
E-book viewer: Disallow background images from the internet. This was an unused feature anyway (CVE-2026-33205)
TXT Input: Ensure resource files are read only from book contents (CVE-2026-33206)
Only apply changes to text fields in the book list when the new value is different from the old
Closes tickets: 2144489

Completions: Update list of completion suggestions when cursor is moved
Closes tickets: 2144486

New news sources

L'Humanite by Kabonix
Telerama by Kabonix
Le Parisien by Kabonix
Improved news sources

BusinessLine
Naked Capitalism
Le Canard Enchaine
Le Monde
Courrier International
L'Equipe by Kabonix

New features

E-book viewer: Add "reading stats" to show reading progress
Closes tickets: 2142715

Edit book: Nicer UI for changing the entries in the insert tag menu
Cover grid: Option to draw emblems on top of cover in Preferences->Look & feel->Cover grid->Emblems
Cover grid: Add option to draw text flush with bottom of rendered cover
Bug fixes

DOCX Input: Fix paragraph/list margins in documents created by LibreOffice that do not have Word 2007 compatibility
Closes tickets: 2142611

ODT Input: Fix a regression in the previous release that broke conversion of images
Closes tickets: 2142345

Content server: When banning IPs for repeated login is enabled, only use the IP address not any HTTP headers as the ban key (CVE-2026-27824)
Content server: Sanitize content disposition received as query parameter (CVE-2026-27810)
Improved news sources

WIRED Daily
TOI Print Edition

The official source code repository for the calibre ebook manager - Release version 9.3.1 · kovidgoyal/calibre

The official source code repository for the calibre ebook manager - Release version 9.0.0 · kovidgoyal/calibre

Source: https://calibre-ebook.com/whats-new

New features

• E-book viewer: Improve display of Lookup results from Google
• Kobo driver: Add support for latest Tolino firmware
• Conversion: Handle -epub-text-emphasis properties used in some Japanese language EPUB books
• Piper Neural text to speech engine: re-write the backend used to run the Piper speech models to no longer need an external binary for improved performance and robustness. Closes tickets: 2117433

Bug fixes

• Edit book: Reports: Fix sorting by name of CSS rules
• Fix template based custom column of tags type not being treated as multi valued when using it for similarity searches. Closes tickets: 2118744
• When adding books recursively do not try to import folder whose names named with an ebook file extension. These are, for example, generated by Apple Books
• EPUB3 Output: Fix various issues with processing nav files when they contain more than just the Table of Contents and are not included in the spine. Closes tickets: 2117255, 2117336

Improved news sources

• Economist
• Press Information Bureau
• Indian Express
• Wall Street Journal
• De Tijd
• Washington Post

I've just converted a PDF to epub in calibre but because the PDF has two columns of text on each page the ouput epub is essentially 'combing' all the lines ton the PDF's page together, making the epub very hard to read.

How do I make Calibre feed one column at a time from each page into the conversion?

Hope that makes sense and thanks!

So I just started using calibre on my tablet pc. I have an issue where any italicized text is put in a block with a background the same color of the body. I'm assuming this has a greater z-index so it blocks the text above and below any italicized text.

I have installed the opens-dyslexic font and am using it and it really does help. Even if it looks a little comic sans like. Pretty sure its not the font causing this and its a bg color being applied to the italicized text with a greater z-index than the body at least that what it looks like. I have used CSS since its adoption but I really hate it! I don't do any real work with it anymore.

So I was wondering if there was a general easy way to download styles and hopefully apply them to all books? It would really suck to have to find issues in css and fix them per book just to be able to read.

First book was styled nicely. Maybe there wasn't any italic in the text though.

Using the latest Calibre
OS: arch
DE: kde
On a MS Surface Pro 9

Side issue, the calibre main interface is kind of touch unfriendly in that I cant open books without the stylus or a mouse. Is that an issue for any one else? Every other part of the UI works pretty flawlessly with a finger.

Any advice is appreciated.

cross-posted from: https://lemmy.dbzer0.com/post/40762255

Cross-posted from "Calibre subreddit succumbs to (probable) pressure and removes a thread discussing a fully legal way of bypassing an e-book DRM solution (LCP) created by a particularly litigious organization" by @Yingwu@lemmy.dbzer0.com in !reddit@lemmy.world

Sorry for the long title. Some context to this: Readium LCP is a DRM-solution created and delivered by the non-profit foundation EDRLab (I guess we've learned by now that non-profit doesn't equal good), based in France.

EDRLab is an international, non-profit development laboratory working on the deployment of an open, interoperable and accessible digital publishing ecosystem worldwide.

In recent years they've gained a large market share in the EU first and foremost, providing both regular e-book shops in many EU countries and libraries with this DRM (if you're interested in some more technical information regarding this DRM solution, I'd recommend reading Terence's previous blog post). What's particular to this solution is that they've historically been very litigious about any attempts to DeDRM it. The most famous plugin for DeDRMing books in Calibre (mainly Adobe DRM) has been the NoDRM plugin, and they did release a DeDRM solution to LCP v1.0 but they were threatened with legal action with a DMCA takedown request (read more on Github).

In recent days, Terence Eden posted a fully legal solution on his blog on how to bypass their DRM. This was also posted to the /r/Calibre subreddit, see the following image: I also made a thread on Lemmy here.

Nonetheless, after around a day the thread was removed on the Calibre subreddit. The only rule I could find that maybe could be applied to this (if it was illegal, and if Terence did this with any other material that wasn't his own) is the rule against piracy. But it feels weird.

This subreddit has previously allowed, and still allow, discussions around the NoDRM plugin and how to DeDRM the Adobe DRM. What makes this fully legal solution of bypassing LCP any different? It can probably be deduced that the EDRLab foundation contacted the subreddits moderators, or reddit admins, and "threatened" them in order to have it taken down. Or guilt tripped them as they also did towards Terence. Aside from their previous DMCA takedown request to the NoDRM people, just look at their arrogant correspondence towards Terence (more in his blog post). Threatening him on no legal basis as well as somehow blaming their failure on developing accessibility tools to him posting about this solution:

"We were planning to now focus on new accessibility features on our open-source Thorium Reader, better access to annotations for blind users and an advanced reading mode for dyslexic people. Too bad; disturbances around LCP will force us to focus on a new round of security measures, ensuring the technology stays useful for ebook lending (stop reading after some time) and as a protection against oversharing."

These are some of the reasons why I think a federated web will be necessary moving forth. I really dislike DRM, but also these methods that DRM organizations use in order to control the conversation. Thanks for reading and engaging with my small fixation on DRM and especially LCP :)

Hi, is there any way to sync devices directly to Calibre server? I would like to keep the database on a server and sync directly from there. This would allow to leave out syncinc the library to a laptop first. Thanks for your support!

I manage my ebooks locally and then upload them to my calibre-web container via the webui. It's there an easier way to do this? I no longer use a shared backend storage for fear of corruption/loss so i was looking for an easier way (export plug-in?). Any one have any ideas?

I use the page count plugin plus a template program I adapted from one found online (included below) to build a column that categorizes books by length. (I use this to build collections I use when I’m picking my next to read)

I’d like to exclude certain books from getting a classification though if they are PDFs or have tags like “Graphic Novel” or “Cookbook”. I’d appreciate any help figuring this out.

program:
val = field('#pagecount');
first_non_empty(
	cmp(val, 0, ' ', '', ''),
	cmp(val, 15, 'Flash Fiction', '', ''),
	cmp(val, 50, 'Short Story', '', ''),
	cmp(val, 100, 'Novelette', '', ''),
	cmp(val, 250, 'Novella', '', ''),
	cmp(val, 500, 'Short Novel', '', ''),
	cmp(val, 750, 'Long Novel', '', ''),	
	cmp(val, 1000, 'Tome', '', ''),
	'Toe Breaker');

I frequently use Calibre to convert academic papers from PDF to epub, so I can read them on my tablet. But the conversion often results in weird formatting artifacts.

I'm aware that in the Conversion tool, there's a Search & Replace section, where I can list various expressions that will help me remove things like page numbers. This post has some helpful expressions for that. For example:

\d+<br>\n|\d+\w<br>\n|\w\d+<br>\n

Does anyone have a list of more expressions that they use when converting academic papers from PDF to epub? Especially any good expressions for handling footnotes?? I would love to get a bunch together, save them, and then simply load them every time I have to do this.

Thanks all!

A bit of a long shot, but I guess it doesn't hurt asking.

I'm using Calibre with the library on a network share (I'm aware this is not recommended, however I'm using this for years without any problems on Windows and Mac OS). Recently I gave Linux another shot and I stumbled upon a problem with accessing my network share.

When trying to add this library which is sitting on the network share, the Calibre file explorer doesn't show the network locations I added in Dolphin in the "Remote" tab. Is there any way to convince Calibre to find these network locations without adding the shares in /etc/fstab?

Edited meta in Calibre doesn't stick with the epub file. Is there any method to edit dc: meta in epub and the designated series under series shows up in Calibre?

Thanks and trying my best to explain the concept. If this is to vague please provide guide to explain more specific.

New features

• PDF Output: Add an option to discard the book cover instead of inserting it as the first page of the PDF
• Content server: Allow opening the book details page for a matches book from the Full text search results page

Bug fixes

• Windows: Fix empty data folder getting created in directory calibre is launched from when changing title/author for a book with an existing data folder
• LIT Output: Fix error converting anything to LIT on Windows
• Ignore failures to expire old trash during startup
• Amazon metadata download: Fix retrieval of publisher information from amazon.fr

New news sources

• ThePressProject by Sotiris Papatheodorou

Improved news sources

• Guardian & Observer
• Washington Post
• Private Eye
• Associated Press

Source: link

I have my calibre synced from pc to Nextcloud and use the android app to link them together.

I mostly read reference books - recipes, photography, history - so I don't need, or have the space to keep the books on my mobile phone.

This works great however, what I'd really like to do is read my books without having to download them first.

I guess I'm looking for a lazy approach to reading my reference books without storing them all on my phone.

Anyone have any different approaches that I can learn from?

Hi! Does anybody know how to change the format of the dates to YYYY-MM-DD?

Thanks!

I have 3 different libraries, one for comics, one for TTRPG books, and my main one for actual eBooks. My main library is over 4GB with over 1,000 books.

No, I haven't read all of them, but I am working on it. They have been collected over the last 15 years from Sony eReader store, Kobo books, Amazon Kindle, B&N, Archive.org and other Public Domain books hosts, Humble Bundle, Story Bundle, and various other places.

Largest categories are Sci-Fi, Fantasy, and Mystery.

I wish there was a way to link to an Android app.

This community is meant for discussion about the open source ebook management software Calibre. Technical questions and feature discussions about calibre are welcome.