ISBN already in use
The “ISBN already in use” error may appear if you have a draft in the same account with the same ISBN listed. Please continue the publishing process using one draft and delete the other, the account will not allow duplicates. Clicking “publish” without listing an ISBN will also assign a Kobo generated ISBN to the book which cannot be changed later. It is best to go back to your original draft so you can use the ISBN on the account.
100MB Error Help:
The file size for your book (including images) cannot exceed 100MB.
You may be able to reduce the size of the file by doing the following:
- Compress Images: Use image editing software to adjust the size or reduce the resolution of the images within the EPUB.
- Remove Unused Images: If there are any images in the EPUB that are not being used in the text remove them.
- Compress file: Use an EPUB compression tool to compress your EPUB file while maintaining its integrity.