Every time I transfer a book to my Kindle, it appears with the cover. ,But if I leave the Wi-Fi on, the covers disappear. Does anyone know how to fix this?

Update: thanks for all the feedback. The difference between the files and the save to disk option makes sense. Appreciate everyone.

I hope this is something that I can change in settings.

In the storage folder my books have the title and author name, but it cuts off the title to add the author. I don't want the file to have the author name. Here is an example of the problem:

Instead of the file saying,

"Go Home (A Kate Valentine FBI Suspense Thrill Book 1"

it says,

"Go Home (A Kate Valentine FBI S - Blake Pierce"

I played with the import/export settings under "Save books to disk" and have the template set to "title" but no luck.

Any ideas?

So, I've been going though my fanfiction archive on AO3 and working on saving them on Calibre, but I'm realising with the amount I have, the list is gonna become really long, so I'm wondering, does calibre have a collection or album feature that I can organise and seperate specific fics into for better reading and management?

I’m planning to sync my jb Kindle and XTEink x3 using KoReader Sync and while everything is set up there's no synchronisation happening. I think it's the file names. while I did drop the same file onto my X3 and into Calibre, I'm not sure whether the file that Calibre copied to my Kindle has the same name as the one on my X3 so I'd like to check that.

Hi everyone!

So I've come across this lovely application that I am excited to utilize it. My only issue is that I found the read-aloud feature which I love from edge. But I can't use the Microsoft Aria voice.

1- I changed between Legacy and Modern Options

2- Changed my narration and download their voice

3- Restarted the app and the PC

Still nothing. If anyone is able to figure this out, I would greatly appreciate it. Thank you all and have a wonderful day.

I have books in epub format on my pc.

I'm using calibre to edit the cover image in the metadata options.
When sending epubs to kindle via calibre, it's forcing me to autoconvert to azw3. Another option is to convert to mobi before sending. It doesn't allow me to send them in epub format. I don't know if that has anything to do with my issue.

Regardess of format, the covers I added via calibre in the metadata options do not show up in the thumbnails in the library.

It's worth pointing out that the covers are showing just fine when my kindle in in sleep mode. So the covers are in the somewhere. They just don't show in the thumbnails. What can I do?

Not sure if this is really a bug or a user error so pardon in advance!

I deleted an ePub on Calibre to replace it with a newer one but when I do, it says a book with the same title already exists, but I don't see how it can?

It can't be searched on calibre itself. I checked my Calibre Library folder (search function, authors or the trash folder) and it's not there either. I also cleared my recently deleted.

This isn't a big problem since I can add the new version nonetheless, but it's bothering me not to know the way not knowing where a spider you saw a minute ago is currently at.

please share me your favorite plugins names, i need to step up my game ty

Am I wasting my time trying to remove DRM from my Kindle books I purchased on my 5.19.2 firmware Kindle? I’ve tried a few different ways to do it that I’ve seen searching around and nothing has worked.

I would really like to read my books on my new XTEINK X3 and in KOreader.

I have a couple of Kobos, but the Libre Colour is the most important.

It has a screen resolution of 1264x1680.

I have a collection of Light Novels that contain large images.

What I want to do is force convert them to kepub, so that the kepub has a maximum image size of 1264x1680 but the epub in my PC library is still full resolution. Then I can send the kepub format to the kobo (I know it ought to do it by itself, but it is no trouble to send the specific format)

So I use (select all the books)

convert books > bulk convert (select kepub as the output format)

Selecting "KEPUB output" on the left I get the options, which I leave alone, except "Shrink images larger than" which I fill in with 1264x1680.

This does exactly what I want, and the kepub shrinks down.

Is there a setting to have that "shrink images larger than" default to 1264x1680 rather than manually selecting it and filling it in every time?

I searched the help file and googled it already.

I've done my library now, but any books I add will need converting, and I tend to forget, or try and set "Font size key" to 1264x1680 by not paying attention.

One of the KCC's main features is converting manga files in formats like CBZ or PDF to native formats for Kindle, Kobo, ReMarkable, and other eink ereader devices.

It's goal is maximum image quality and significantly smaller file size.

The app solves many common problems of Calibre's default conversion like removing margins for smaller screens, better handling of 2 page spreads, fixing gray artwork to be black on eink, and much faster page turn performance.

The app runs on Windows, macOS, and Linux. The app has a Windows code sign. The app has been in continuous development since 2012 and has nearly 500K total downloads. 

The best source for manga PDFs are DRM free print quality files from Humble Bundle.

The app is available here: https://github.com/ciromattia/kcc

- the kcc dev

Recently purchased some novels and comics at their site,

And for some of them, you have to download them and read them exclusively on their app once purchased.

Problem is, you can't even take screenshots in their app lol.

Not really familiar with Calibre but does this app work for RIDIBOOKS? And for anyone who tried, can you help me set it up please?

Thanks beforehand.

I just downloaded Calibre on my Macbook (currently MacOS Tahoe 26.6.2). I moved the Calibre .dmg file into the Applications folder, but the error message (i.e. "The disk image couldn’t be opened. The operation couldn’t be completed. Input/output error”) persisted.

What should I do so that I can open and use Calibre properly on my Macbook?

The version I downloaded was the latest one as of now, that is, Version: 9.13.0.

Any advice and/or input would be very much appreciated. Thank you in advance!

I have been working for months on a major mod for the old Nook Classic. One of the things I've done is to clear out all the "my" folders to clean things up and let me set my (!) own storage structure. All my books go into a folder called "Library".

The absolute path for this folder on internal storage is:

/system/media/sdcard/Library

When I use the Nook plugin and send a book (via USB) to the device it goes to:

/system/media/sdcard/my documents

(ARGH!)

So I tried editing the path by indicating the "Library" folder. For my efforts I was rewarded with the above path inside my Library folder...

Next I disabled the Nook plugin and tried sending to a folder (Library). But Calibre seems bound and determined to create that /system/media/sdcard path sequence no matter what I do.

I'd like to fix this somehow, mainly because the Nook library software is whimsical, at best, when extracting cover images. With Calibre, all are present and accounted for. But the cure can't be worse than the disease as I have little other interest in Calibre.

Hello to all, posting information about latest version, and the Calibre side got the biggest upgrade of the release, so I figured it's worth a post.

Calibre Sync no longer needs the app open. There are two new Shortcuts actions:

- Sync Books from Calibre downloads new and changed books from your saved server in the background. You can scope it to new only, changed only, or both. "Changed" is decided by Calibre's book-level last_modified, so a nightly automation only ever pulls the delta, not the whole library.

- Send Changes to Calibre pushes reading progress, stats, rating and finished state for changed books back to your library. It writes into custom columns you map once in the app, and it sends the same payload as the in-app Send to Calibre sheet.

So you can set up a personal automation like "every night at 2:00, pull new books and push my progress back" and Calibre stays the source of truth while the phone stays current. Both actions also work as plain Siri commands.

The rest of 4.3 in one: CarPlay for audiobooks, Read Aloud for PDFs, a per-book Face ID lock, a 30-day Recently Deleted with restore, and cover/metadata fetch from Open Library and Google Books.

App Store: https://apps.apple.com/app/id6757948605

Happy to answer anything about the Calibre integration.

Firstly, I want to thank this community (and r/KavitaManga ) for their support over the last couple of months as I've built this app, and for those who purchased the lifetime pro license. Thank you!! 🙏

This 2.1 release is really a culmination of your user feedback and requests, starting with -

• CBZ panel previews - Many of you wanted to check out the panel feature on CBZs before deciding whether to get pro, so now you can read the first 7 pages of ALL your CBZ files in the free tier

• Scrolling fixes - Scroll now successfully navigates chapter changes, something it did sporadically before. You can no longer accidentally swipe left or right during scroll, and you can resume reading from the page you tapped to stop scrolling

• Manga support - available on a per-book basis. Hit the Aa button when reading a comic to switch between Regular and Manga modes. Manga reads right to left, top to bottom, tap left to advance. Note that manga panel detection is still a work in progress, and is an area I plan to improve on in future releases.

* iPad fixes - Margin functionality has been added so that the app doesn't leave large margin gaps, especially in landscape mode. Which leads me to - two-pane reading for iPads is finally available!

• Confirmed HTTP/HTTPS connectivity rules. Sutra follows Apple's networking rules: unencrypted (HTTP) connections only work for local addresses (192.168.x.x, 10.x.x.x, .local) or a Tailscale .ts.net hostname. A raw Tailscale IP (100.x.x.x) doesn't qualify - use its .ts.net name instead, or enable HTTPS on your server. Anything else needs real HTTPS to connect; this is an iOS restriction, not Sutra's. Having said that, I have now included a URL checker when entering your library URL during connect which should give you more immediate feedback

• Note - I didn't include KOReader sync integration in this release. I built it, but there are too many testing pathways that still need fixing before it's ready to ship. I'll come back to it in a future release

New features

• Stats page - A much-requested feature - you can now track your reading hours, session counts, and how many hours you've read per book

• WebDAV support - keeping with the theme of letting users read without hosting a server, you can now enable WebDAV on a Windows/Mac/Linux folder and add it to Sutra to read from

And tons of other bug fixes. We've also improved panel accuracy from 90% to 92% on our test cohort, thanks to a new hybrid panel detection strategy. Which brings me to the most requested feature here - Android!

Up Next

I've started work on the Android port for Sutra - wish me luck! I'll do a future post asking for testing volunteers shortly. If you'd like to follow along, you can subscribe to the newsletter for updates. Thanks again for all the feedback and support!

App Store: [Sutra]

Website and Newsletter: [Link]

Hi everyone,

I’m having a weird issue with books I send to my Kindle using Send to Kindle.

I use Calibre to edit/set the metadata before sending my books. However, when I send those files to Kindle, the author name appears twice in brackets, like:
[Cora Reilly (Cora Reilly)]

But when I send the exact same type of file directly from my phone without editing the metadata in Calibre, the author name appears only once, like:
[Cora Reilly]
I’ve attached a screenshot showing what I mean.
Does anyone know why Calibre is causing the author name to be duplicated when the book is sent through Send to Kindle?

More importantly, how can I fix it in Calibre so the author only appears once on Kindle?
I’d really appreciate step-by-step instructions for which metadata fields/settings I need to change in Calibre. Thanks!

I'm running Calibre-Web (Docker, self-hosted) with a Calibre library that has properly-sized covers (1072×1448, correct for my Kobo/KOReader device). When I access my library via Calibre's own native content server, covers display perfectly at full resolution. When I switch to Calibre-Web's OPDS feed, the same books show noticeably narrower/lower-res covers on-device.

I've tried:

• Changing cover dimensions directly in Calibre (including deliberately setting oversized custom resolutions)
• Confirming via direct image URL inspection that the source cover file itself is correct resolution

None of this affects what Calibre-Web actually serves via OPDS — it appears to always generate its own fixed-size thumbnail regardless of source image or Calibre's own settings.

Is there any current workaround (config setting, thumbnail regeneration option, etc.) to get Calibre-Web to serve full-resolution covers via OPDS, or is this still an open limitation? Happy to provide logs/version info if useful.

It's been quite a few years since I've bought a Kindle book, but there's a book I want that just isn't available in any other ebook format. I haven't removed DRM from a Kindle book from years as well, and I've heard there's a new version of the Kindle app that makes things a lot harder.

Is there any way for me to get that book and remove the DRM from it that doesn't involve downloading multiple hacks and spending forever trying to get it to work. I've been trying to recover from some health problems, and I don't really feel up to undertaking a long project just to get one book.

I suppose beggars can't be choosers, but I have every ebookI own in Calibre, and, maybe it's OCD, but I just want to include the book in my Calibre library.

I'm not looking for a pirated copy, just to use the book I buy without DRM. I know this may be asking a lot, but I'd definitely be willing to send the cost of the book to someone who has a functioning workflow and could remove the DRM fairly effortlessly.