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It turns out it's a factory setting for the FNAC versions. It can be changed by connecting it to your computer and editing a file inside a hidden folder: .kobo/affiliate.conf. You should change it from affiliate=fnac to affiliate=Kobo. This was found at a MobileRead Forum post, and I thought it should be here for making it easier to be found.

Calibre has had an option to insert a cover long before it offered editing some ebook formats. That option comes with additional utilities of finding a fitting cover using some internet services. If such a cover is not selected, calibre generates its own and inserts that in the epub file. With the relatively new editing possibilities in Calibre, the cover ...

This depends on where you are publishing your e-book, and is subject to change. With Kindle Direct Publishing, they require a minimum of 625 pixels on the shortest side and a minimum of 1000 pixels on the longest side, but they recommend 2500 pixels on the longest side. With Nook, they require that the height and width be at least 1400 pixels, and the file ...

Yes we can do that using opensource software like Calibre. Install the Calibre software and start the program. Copy the ebook.mobi file to your PC. Drag the book onto the Calibre software UI. It will get imported. Right click and select "edit metadata" for individual book you want to change. There is option to browse and select the cover that you want. Save ...

Actually, there's an easier way of changing the content: Change the file extension of your epub book from ".epub" to ".zip" You will be able to access all content because, now, the file became just a regular zip file Alter any file you want (including the cover image) Change the file extension from ".zip" back to ".epub" Voilà!!! Extra: You can do the ...

linear="no" is the attribute that prevents a file in the spine from appearing in iBooks. In your case, you would simply remove it from this line which appears in the content.opf file: <spine toc="ncx"> <itemref idref="cover" linear="no"/>

I've found a similar question to mine, but titled more generally: Kindle doesn't show cover

Since you can only specify one size, and not have the selected image depend on the devices resolution, you best take something that is as large as the largest expected screen format. I would at least go for 758 × 1024, but you can consult this table and decide for yourself. Scaling down is normally OK, whereas scaling up always introduces artefacts.

Unless I am mistaken I hacked a fix for this at some point by (1) unzipping the epub and (2) running a sed one-liner that edited the html to embed the image in an adhoc <svg> tag so it automatically resized to the size of the screen and (3) zipped back the epub. Doesn't matter any more in any case because shortly afterwards I opened a ticket with ...

For iBooks issues, your best bet is to go straight to the iBooks Asset Guide, which is available when you log in to your iTunes Connect account. As far as cover size goes, the guide says: The book’s cover art must use RGB color mode and should be at least 1400 pixels along the shorter axis. For best results, a good rule of thumb is to use an image ...

<?xml version="1.0" encoding="UTF-8" standalone="no"?> <svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" etc etc> This works in Kobo, make sure the two declarations come before anything, put width, height etc after. Kobo wants the svg declaration first, drop the xmlns="http://www.w3.org/1999/xhtml" you do not ...

I'll disagree strongly with Sekhemty: Oxygen is a far superior tool to either Sigil or Calibre, both of which (last I used them, anyway) do all kinds of things to your files without telling you about them. Oxygen is incredibly powerful, and I'd use it in a heartbeat if it wasn't so expensive. To post the code, try just pasting it into the text box you're ...

Use a dedicated epub editor instead of a generic xml one, you will have you work greatly improved with a lot of specific optimizations for ebooks. With Sigil and the Calibre internal editor I've never had this kind of problem, and I use a Kobo ereader regularly.