We're aware of an issue with converting some DOC, DOCX, ODT, and RTF files to EPUB through our Ebook Wizard.
We've created this Forum Thread with some workarounds and advice to assist you in publishing you ebook.

I can not upload the .epub preview of my ebook

Good evening everybody.
When I try to upload the 35kb .epub preview of my ebook (created with Calibre), after the uploading bar is full/process is done, the page refreshes and gets blank, and, if I check the ebook page, the preview has not been created.
I have tried with a .docx preview, it uploads, but when I open it, it is unreadable.
I went with a .doc, and it works, but I would prefer to have an .epub preview.
Any suggestions?



  • Ebook previews must be uploaded as either a DOCX or EPUB file.

    The maximum file size for previews is 2MB.

    Revising a Preview

    If you have a Preview created, you will have the option on the Revision page to 'edit' the Preview or create a replacement Preview.

    When you select 'edit' you'll see two additional options:

    Keep Current Preview

    • Keeps whatever is currently set as your preview. The default is "Simple."
    Remove Current Preview
    • Removes the preview for your book. Your book will not have a preview.

    When you create a new preview, you lose your old preview. Make sure you have a backup of your existing custom preview before experimenting, so you can reinstate it if you wish.

  • This sounds like an issue our support team needs to look at.
    I'm having the same problem uploading a docx preview. I used this several times in the past bu now it is unreadable. 
    Cancel that. After trying a few times, it has now worked.
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