Thanks for reaching out to OkadaBooks. To change your book's cover image.

Visit . Click PUBLISH. Click START PUBLISHING. Sign in to your account.

On the left hand side, click on PUBLISH and go to MY PUBLICATION..

Locate the book you want to edit and click the pencil icon next to it.

Hover on the image and click on upload cover

Scroll down and click REPUBLISH.  That's it! You've successfully updated your book cover.

Contact if you're not able to change your cover.